diff --git a/examples/DemoRunner/Builds/Android/app/CMakeLists.txt b/examples/DemoRunner/Builds/Android/app/CMakeLists.txt
index 9f79a9c32f..19e10673ad 100644
--- a/examples/DemoRunner/Builds/Android/app/CMakeLists.txt
+++ b/examples/DemoRunner/Builds/Android/app/CMakeLists.txt
@@ -138,6 +138,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.cpp"
     "../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.h"
     "../../../../../modules/juce_audio_devices/native/juce_android_Audio.cpp"
+    "../../../../../modules/juce_audio_devices/native/juce_android_HighPerformanceAudioHelpers.h"
     "../../../../../modules/juce_audio_devices/native/juce_android_Midi.cpp"
     "../../../../../modules/juce_audio_devices/native/juce_android_Oboe.cpp"
     "../../../../../modules/juce_audio_devices/native/juce_android_OpenSL.cpp"
@@ -1742,6 +1743,7 @@ set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/j
 set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Audio.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_HighPerformanceAudioHelpers.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Midi.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Oboe.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_OpenSL.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
diff --git a/examples/DemoRunner/Builds/Android/app/src/main/AndroidManifest.xml b/examples/DemoRunner/Builds/Android/app/src/main/AndroidManifest.xml
index dcc3a8b3a2..7766418ecc 100644
--- a/examples/DemoRunner/Builds/Android/app/src/main/AndroidManifest.xml
+++ b/examples/DemoRunner/Builds/Android/app/src/main/AndroidManifest.xml
@@ -2,7 +2,8 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="5.4.7"
           package="com.juce.demorunner">
-  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:anyDensity="true"/>
+  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:anyDensity="true"
+                    android:xlargeScreens="true"/>
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
diff --git a/examples/DemoRunner/Builds/Android/app/src/main/assets/DemoUtilities.h b/examples/DemoRunner/Builds/Android/app/src/main/assets/DemoUtilities.h
index 0893cfc0d7..829a883a87 100644
--- a/examples/DemoRunner/Builds/Android/app/src/main/assets/DemoUtilities.h
+++ b/examples/DemoRunner/Builds/Android/app/src/main/assets/DemoUtilities.h
@@ -74,11 +74,11 @@ inline File getExamplesDirectory() noexcept
    #endif
 }
 
-inline InputStream* createAssetInputStream (const char* resourcePath)
+inline std::unique_ptr<InputStream> createAssetInputStream (const char* resourcePath)
 {
   #if JUCE_ANDROID
     ZipFile apkZip (File::getSpecialLocation (File::invokedExecutableFile));
-    return apkZip.createStreamForEntry (apkZip.getIndexOfFileName ("assets/" + String (resourcePath)));
+    return std::unique_ptr<InputStream> (apkZip.createStreamForEntry (apkZip.getIndexOfFileName ("assets/" + String (resourcePath))));
   #else
    #if JUCE_IOS
     auto assetsDir = File::getSpecialLocation (File::currentExecutableFile)
diff --git a/examples/DemoRunner/Builds/LinuxMakefile/Makefile b/examples/DemoRunner/Builds/LinuxMakefile/Makefile
index c9d711ebb0..bbe1e96570 100644
--- a/examples/DemoRunner/Builds/LinuxMakefile/Makefile
+++ b/examples/DemoRunner/Builds/LinuxMakefile/Makefile
@@ -41,7 +41,7 @@ ifeq ($(CONFIG),Debug)
 
   JUCE_CFLAGS += $(JUCE_CPPFLAGS) $(TARGET_ARCH) -g -ggdb -O0 $(CFLAGS)
   JUCE_CXXFLAGS += $(JUCE_CFLAGS) -std=c++14 $(CXXFLAGS)
-  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) $(shell pkg-config --libs alsa x11 xinerama xext freetype2 webkit2gtk-4.0 gtk+-x11-3.0 libcurl) -lrt -ldl -lpthread -lGL $(LDFLAGS)
+  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) $(shell pkg-config --libs alsa x11 xinerama xext freetype2 webkit2gtk-4.0 gtk+-x11-3.0 libcurl) -fvisibility=hidden -lrt -ldl -lpthread -lGL $(LDFLAGS)
 
   CLEANCMD = rm -rf $(JUCE_OUTDIR)/$(TARGET) $(JUCE_OBJDIR)
 endif
diff --git a/examples/DemoRunner/Builds/MacOSX/DemoRunner.xcodeproj/project.pbxproj b/examples/DemoRunner/Builds/MacOSX/DemoRunner.xcodeproj/project.pbxproj
index e9d4f16bb5..42ff15e603 100644
--- a/examples/DemoRunner/Builds/MacOSX/DemoRunner.xcodeproj/project.pbxproj
+++ b/examples/DemoRunner/Builds/MacOSX/DemoRunner.xcodeproj/project.pbxproj
@@ -991,7 +991,6 @@
 					"JucePlugin_Build_Standalone=0",
 					"JucePlugin_Build_Unity=0",
 				);
-				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				HEADER_SEARCH_PATHS = (
 					"../../JuceLibraryCode",
@@ -1035,11 +1034,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
@@ -1083,10 +1083,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
diff --git a/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj b/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj
index 2fd74b7249..aadc3b7536 100644
--- a/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj
+++ b/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj
@@ -2304,6 +2304,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\audio_io\juce_SystemAudioVolume.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiDevices.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_MidiDataConcatenator.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\sources\juce_AudioSourcePlayer.h"/>
diff --git a/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj.filters b/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj.filters
index 8bdd409cff..8b69d1850a 100644
--- a/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj.filters
+++ b/examples/DemoRunner/Builds/VisualStudio2015/DemoRunner_App.vcxproj.filters
@@ -2985,6 +2985,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h">
       <Filter>JUCE Modules\juce_audio_devices\midi_io</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h">
+      <Filter>JUCE Modules\juce_audio_devices\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h">
       <Filter>JUCE Modules\juce_audio_devices\native</Filter>
     </ClInclude>
diff --git a/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj b/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj
index 952d10f705..d443749c43 100644
--- a/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj
+++ b/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj
@@ -2304,6 +2304,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\audio_io\juce_SystemAudioVolume.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiDevices.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_MidiDataConcatenator.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\sources\juce_AudioSourcePlayer.h"/>
diff --git a/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj.filters b/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj.filters
index 4b163b6d33..8a60d7cb5b 100644
--- a/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj.filters
+++ b/examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj.filters
@@ -2985,6 +2985,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h">
       <Filter>JUCE Modules\juce_audio_devices\midi_io</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h">
+      <Filter>JUCE Modules\juce_audio_devices\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h">
       <Filter>JUCE Modules\juce_audio_devices\native</Filter>
     </ClInclude>
diff --git a/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj b/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj
index 74bb1dbb5d..5ef430f7f2 100644
--- a/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj
+++ b/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj
@@ -2304,6 +2304,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\audio_io\juce_SystemAudioVolume.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiDevices.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_MidiDataConcatenator.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\sources\juce_AudioSourcePlayer.h"/>
diff --git a/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj.filters b/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj.filters
index 334070cb99..3b272dc205 100644
--- a/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj.filters
+++ b/examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj.filters
@@ -2985,6 +2985,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h">
       <Filter>JUCE Modules\juce_audio_devices\midi_io</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h">
+      <Filter>JUCE Modules\juce_audio_devices\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h">
       <Filter>JUCE Modules\juce_audio_devices\native</Filter>
     </ClInclude>
diff --git a/examples/DemoRunner/Builds/iOS/DemoRunner.xcodeproj/project.pbxproj b/examples/DemoRunner/Builds/iOS/DemoRunner.xcodeproj/project.pbxproj
index e4d6e3400c..53c72a8663 100644
--- a/examples/DemoRunner/Builds/iOS/DemoRunner.xcodeproj/project.pbxproj
+++ b/examples/DemoRunner/Builds/iOS/DemoRunner.xcodeproj/project.pbxproj
@@ -977,7 +977,6 @@
 					"JucePlugin_Build_Standalone=0",
 					"JucePlugin_Build_Unity=0",
 				);
-				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				HEADER_SEARCH_PATHS = (
 					"../../JuceLibraryCode",
@@ -1020,11 +1019,12 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
@@ -1070,10 +1070,12 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
diff --git a/extras/AudioPerformanceTest/Builds/Android/app/CMakeLists.txt b/extras/AudioPerformanceTest/Builds/Android/app/CMakeLists.txt
index 762bb07fee..a27235f12b 100644
--- a/extras/AudioPerformanceTest/Builds/Android/app/CMakeLists.txt
+++ b/extras/AudioPerformanceTest/Builds/Android/app/CMakeLists.txt
@@ -119,6 +119,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.cpp"
     "../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.h"
     "../../../../../modules/juce_audio_devices/native/juce_android_Audio.cpp"
+    "../../../../../modules/juce_audio_devices/native/juce_android_HighPerformanceAudioHelpers.h"
     "../../../../../modules/juce_audio_devices/native/juce_android_Midi.cpp"
     "../../../../../modules/juce_audio_devices/native/juce_android_Oboe.cpp"
     "../../../../../modules/juce_audio_devices/native/juce_android_OpenSL.cpp"
@@ -1408,6 +1409,7 @@ set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/j
 set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Audio.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_HighPerformanceAudioHelpers.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Midi.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Oboe.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_OpenSL.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
diff --git a/extras/AudioPerformanceTest/Builds/Android/app/src/main/AndroidManifest.xml b/extras/AudioPerformanceTest/Builds/Android/app/src/main/AndroidManifest.xml
index 6a6b111846..ca3a390ad5 100644
--- a/extras/AudioPerformanceTest/Builds/Android/app/src/main/AndroidManifest.xml
+++ b/extras/AudioPerformanceTest/Builds/Android/app/src/main/AndroidManifest.xml
@@ -2,7 +2,8 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0.0"
           package="com.juce.AudioPerformanceTest">
-  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:anyDensity="true"/>
+  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:anyDensity="true"
+                    android:xlargeScreens="true"/>
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
diff --git a/extras/AudioPerformanceTest/Builds/LinuxMakefile/Makefile b/extras/AudioPerformanceTest/Builds/LinuxMakefile/Makefile
index 6e877bd02f..b26266f56f 100644
--- a/extras/AudioPerformanceTest/Builds/LinuxMakefile/Makefile
+++ b/extras/AudioPerformanceTest/Builds/LinuxMakefile/Makefile
@@ -41,7 +41,7 @@ ifeq ($(CONFIG),Debug)
 
   JUCE_CFLAGS += $(JUCE_CPPFLAGS) $(TARGET_ARCH) -g -ggdb -O0 $(CFLAGS)
   JUCE_CXXFLAGS += $(JUCE_CFLAGS) -std=c++14 $(CXXFLAGS)
-  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) -L/usr/X11R6/lib/ $(shell pkg-config --libs alsa x11 xinerama xext freetype2 webkit2gtk-4.0 gtk+-x11-3.0 libcurl) -lrt -ldl -lpthread $(LDFLAGS)
+  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) -L/usr/X11R6/lib/ $(shell pkg-config --libs alsa x11 xinerama xext freetype2 webkit2gtk-4.0 gtk+-x11-3.0 libcurl) -fvisibility=hidden -lrt -ldl -lpthread $(LDFLAGS)
 
   CLEANCMD = rm -rf $(JUCE_OUTDIR)/$(TARGET) $(JUCE_OBJDIR)
 endif
diff --git a/extras/AudioPerformanceTest/Builds/MacOSX/AudioPerformanceTest.xcodeproj/project.pbxproj b/extras/AudioPerformanceTest/Builds/MacOSX/AudioPerformanceTest.xcodeproj/project.pbxproj
index 776ea1e168..fd65ab1ce0 100644
--- a/extras/AudioPerformanceTest/Builds/MacOSX/AudioPerformanceTest.xcodeproj/project.pbxproj
+++ b/extras/AudioPerformanceTest/Builds/MacOSX/AudioPerformanceTest.xcodeproj/project.pbxproj
@@ -558,7 +558,6 @@
 					"JucePlugin_Build_Standalone=0",
 					"JucePlugin_Build_Unity=0",
 				);
-				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				HEADER_SEARCH_PATHS = (
 					"../../JuceLibraryCode",
@@ -601,11 +600,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
@@ -649,10 +649,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
diff --git a/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj b/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj
index 8531b49226..c9a43f2cfb 100644
--- a/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj
+++ b/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj
@@ -1901,6 +1901,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\audio_io\juce_SystemAudioVolume.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiDevices.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_MidiDataConcatenator.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\sources\juce_AudioSourcePlayer.h"/>
diff --git a/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj.filters b/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj.filters
index 12212e5187..6426bf7125 100644
--- a/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj.filters
+++ b/extras/AudioPerformanceTest/Builds/VisualStudio2019/AudioPerformanceTest_App.vcxproj.filters
@@ -2382,6 +2382,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h">
       <Filter>JUCE Modules\juce_audio_devices\midi_io</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h">
+      <Filter>JUCE Modules\juce_audio_devices\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h">
       <Filter>JUCE Modules\juce_audio_devices\native</Filter>
     </ClInclude>
diff --git a/extras/AudioPerformanceTest/Builds/iOS/AudioPerformanceTest.xcodeproj/project.pbxproj b/extras/AudioPerformanceTest/Builds/iOS/AudioPerformanceTest.xcodeproj/project.pbxproj
index 54933a532f..7f45bedf90 100644
--- a/extras/AudioPerformanceTest/Builds/iOS/AudioPerformanceTest.xcodeproj/project.pbxproj
+++ b/extras/AudioPerformanceTest/Builds/iOS/AudioPerformanceTest.xcodeproj/project.pbxproj
@@ -595,7 +595,6 @@
 					"JucePlugin_Build_Standalone=0",
 					"JucePlugin_Build_Unity=0",
 				);
-				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				HEADER_SEARCH_PATHS = (
 					"../../JuceLibraryCode",
@@ -637,11 +636,12 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
@@ -687,10 +687,12 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
diff --git a/extras/AudioPluginHost/Builds/Android/app/CMakeLists.txt b/extras/AudioPluginHost/Builds/Android/app/CMakeLists.txt
index eded0ed772..e0fe9df244 100644
--- a/extras/AudioPluginHost/Builds/Android/app/CMakeLists.txt
+++ b/extras/AudioPluginHost/Builds/Android/app/CMakeLists.txt
@@ -136,6 +136,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.cpp"
     "../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.h"
     "../../../../../modules/juce_audio_devices/native/juce_android_Audio.cpp"
+    "../../../../../modules/juce_audio_devices/native/juce_android_HighPerformanceAudioHelpers.h"
     "../../../../../modules/juce_audio_devices/native/juce_android_Midi.cpp"
     "../../../../../modules/juce_audio_devices/native/juce_android_Oboe.cpp"
     "../../../../../modules/juce_audio_devices/native/juce_android_OpenSL.cpp"
@@ -1498,6 +1499,7 @@ set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/j
 set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Audio.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_HighPerformanceAudioHelpers.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Midi.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Oboe.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_OpenSL.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
diff --git a/extras/AudioPluginHost/Builds/Android/app/src/main/AndroidManifest.xml b/extras/AudioPluginHost/Builds/Android/app/src/main/AndroidManifest.xml
index bc70468168..30c57b2ae3 100644
--- a/extras/AudioPluginHost/Builds/Android/app/src/main/AndroidManifest.xml
+++ b/extras/AudioPluginHost/Builds/Android/app/src/main/AndroidManifest.xml
@@ -2,7 +2,8 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0.0"
           package="com.roli.juce.pluginhost">
-  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:anyDensity="true"/>
+  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:anyDensity="true"
+                    android:xlargeScreens="true"/>
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
diff --git a/extras/AudioPluginHost/Builds/LinuxMakefile/Makefile b/extras/AudioPluginHost/Builds/LinuxMakefile/Makefile
index 1ee6149ef7..483e9003fc 100644
--- a/extras/AudioPluginHost/Builds/LinuxMakefile/Makefile
+++ b/extras/AudioPluginHost/Builds/LinuxMakefile/Makefile
@@ -41,7 +41,7 @@ ifeq ($(CONFIG),Debug)
 
   JUCE_CFLAGS += $(JUCE_CPPFLAGS) $(TARGET_ARCH) -g -ggdb -O0 $(CFLAGS)
   JUCE_CXXFLAGS += $(JUCE_CFLAGS) -std=c++14 $(CXXFLAGS)
-  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) -L/usr/X11R6/lib/ $(shell pkg-config --libs alsa x11 xinerama xext freetype2 libcurl) -lrt -ldl -lpthread -lGL $(LDFLAGS)
+  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) -L/usr/X11R6/lib/ $(shell pkg-config --libs alsa x11 xinerama xext freetype2 libcurl) -fvisibility=hidden -lrt -ldl -lpthread -lGL $(LDFLAGS)
 
   CLEANCMD = rm -rf $(JUCE_OUTDIR)/$(TARGET) $(JUCE_OBJDIR)
 endif
diff --git a/extras/AudioPluginHost/Builds/MacOSX/AudioPluginHost.xcodeproj/project.pbxproj b/extras/AudioPluginHost/Builds/MacOSX/AudioPluginHost.xcodeproj/project.pbxproj
index ed5d5b87b7..4332e368ae 100644
--- a/extras/AudioPluginHost/Builds/MacOSX/AudioPluginHost.xcodeproj/project.pbxproj
+++ b/extras/AudioPluginHost/Builds/MacOSX/AudioPluginHost.xcodeproj/project.pbxproj
@@ -836,7 +836,6 @@
 					"JucePlugin_Build_Standalone=0",
 					"JucePlugin_Build_Unity=0",
 				);
-				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				HEADER_SEARCH_PATHS = (
 					"../../../../modules/juce_audio_processors/format_types/VST3_SDK",
@@ -881,11 +880,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
@@ -929,10 +929,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj b/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj
index 8436bc80ae..5a99ed64cf 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj
+++ b/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj
@@ -1977,6 +1977,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\audio_io\juce_SystemAudioVolume.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiDevices.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_MidiDataConcatenator.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\sources\juce_AudioSourcePlayer.h"/>
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj.filters b/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj.filters
index f60af172da..f0c6cf3367 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj.filters
+++ b/extras/AudioPluginHost/Builds/VisualStudio2015/AudioPluginHost_App.vcxproj.filters
@@ -2535,6 +2535,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h">
       <Filter>JUCE Modules\juce_audio_devices\midi_io</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h">
+      <Filter>JUCE Modules\juce_audio_devices\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h">
       <Filter>JUCE Modules\juce_audio_devices\native</Filter>
     </ClInclude>
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj b/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj
index 2a305ff49e..33e5961ed8 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj
+++ b/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj
@@ -1977,6 +1977,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\audio_io\juce_SystemAudioVolume.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiDevices.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_MidiDataConcatenator.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\sources\juce_AudioSourcePlayer.h"/>
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj.filters b/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj.filters
index a94fc227bf..460c20f892 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj.filters
+++ b/extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj.filters
@@ -2535,6 +2535,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h">
       <Filter>JUCE Modules\juce_audio_devices\midi_io</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h">
+      <Filter>JUCE Modules\juce_audio_devices\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h">
       <Filter>JUCE Modules\juce_audio_devices\native</Filter>
     </ClInclude>
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj b/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj
index 81848a76ae..fe7896c327 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj
+++ b/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj
@@ -1977,6 +1977,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\audio_io\juce_SystemAudioVolume.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiDevices.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_MidiDataConcatenator.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\sources\juce_AudioSourcePlayer.h"/>
diff --git a/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj.filters b/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj.filters
index adc0637e5a..649eb2a925 100644
--- a/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj.filters
+++ b/extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj.filters
@@ -2535,6 +2535,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h">
       <Filter>JUCE Modules\juce_audio_devices\midi_io</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h">
+      <Filter>JUCE Modules\juce_audio_devices\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h">
       <Filter>JUCE Modules\juce_audio_devices\native</Filter>
     </ClInclude>
diff --git a/extras/AudioPluginHost/Builds/iOS/AudioPluginHost.xcodeproj/project.pbxproj b/extras/AudioPluginHost/Builds/iOS/AudioPluginHost.xcodeproj/project.pbxproj
index 8ffde9bd26..686cb5ef5c 100644
--- a/extras/AudioPluginHost/Builds/iOS/AudioPluginHost.xcodeproj/project.pbxproj
+++ b/extras/AudioPluginHost/Builds/iOS/AudioPluginHost.xcodeproj/project.pbxproj
@@ -849,7 +849,6 @@
 					"JucePlugin_Build_Standalone=0",
 					"JucePlugin_Build_Unity=0",
 				);
-				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				HEADER_SEARCH_PATHS = (
 					"../../../../modules/juce_audio_processors/format_types/VST3_SDK",
@@ -893,11 +892,12 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
@@ -943,10 +943,12 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
diff --git a/extras/BinaryBuilder/Builds/LinuxMakefile/Makefile b/extras/BinaryBuilder/Builds/LinuxMakefile/Makefile
index 4ade9f34fb..9dd73cfecc 100644
--- a/extras/BinaryBuilder/Builds/LinuxMakefile/Makefile
+++ b/extras/BinaryBuilder/Builds/LinuxMakefile/Makefile
@@ -41,7 +41,7 @@ ifeq ($(CONFIG),Debug)
 
   JUCE_CFLAGS += $(JUCE_CPPFLAGS) $(TARGET_ARCH) -g -ggdb -O0 $(CFLAGS)
   JUCE_CXXFLAGS += $(JUCE_CFLAGS) -std=c++14 $(CXXFLAGS)
-  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) -L/usr/X11R6/lib/ $(shell pkg-config --libs libcurl) -lrt -ldl -lpthread $(LDFLAGS)
+  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) -L/usr/X11R6/lib/ $(shell pkg-config --libs libcurl) -fvisibility=hidden -lrt -ldl -lpthread $(LDFLAGS)
 
   CLEANCMD = rm -rf $(JUCE_OUTDIR)/$(TARGET) $(JUCE_OBJDIR)
 endif
diff --git a/extras/BinaryBuilder/Builds/MacOSX/BinaryBuilder.xcodeproj/project.pbxproj b/extras/BinaryBuilder/Builds/MacOSX/BinaryBuilder.xcodeproj/project.pbxproj
index 557784d551..b0bf9aa68b 100644
--- a/extras/BinaryBuilder/Builds/MacOSX/BinaryBuilder.xcodeproj/project.pbxproj
+++ b/extras/BinaryBuilder/Builds/MacOSX/BinaryBuilder.xcodeproj/project.pbxproj
@@ -232,7 +232,6 @@
 					"JucePlugin_Build_Standalone=0",
 					"JucePlugin_Build_Unity=0",
 				);
-				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				HEADER_SEARCH_PATHS = (
 					"../../JuceLibraryCode",
@@ -273,11 +272,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
@@ -321,10 +321,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
diff --git a/extras/NetworkGraphicsDemo/Builds/Android/app/CMakeLists.txt b/extras/NetworkGraphicsDemo/Builds/Android/app/CMakeLists.txt
index 0b74a58e0b..a14940dbbb 100644
--- a/extras/NetworkGraphicsDemo/Builds/Android/app/CMakeLists.txt
+++ b/extras/NetworkGraphicsDemo/Builds/Android/app/CMakeLists.txt
@@ -123,6 +123,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.cpp"
     "../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.h"
     "../../../../../modules/juce_audio_devices/native/juce_android_Audio.cpp"
+    "../../../../../modules/juce_audio_devices/native/juce_android_HighPerformanceAudioHelpers.h"
     "../../../../../modules/juce_audio_devices/native/juce_android_Midi.cpp"
     "../../../../../modules/juce_audio_devices/native/juce_android_Oboe.cpp"
     "../../../../../modules/juce_audio_devices/native/juce_android_OpenSL.cpp"
@@ -1487,6 +1488,7 @@ set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/j
 set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Audio.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
+set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_HighPerformanceAudioHelpers.h" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Midi.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_Oboe.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
 set_source_files_properties("../../../../../modules/juce_audio_devices/native/juce_android_OpenSL.cpp" PROPERTIES HEADER_FILE_ONLY TRUE)
diff --git a/extras/NetworkGraphicsDemo/Builds/Android/app/src/main/AndroidManifest.xml b/extras/NetworkGraphicsDemo/Builds/Android/app/src/main/AndroidManifest.xml
index d3befd5e9f..f06d90aa51 100644
--- a/extras/NetworkGraphicsDemo/Builds/Android/app/src/main/AndroidManifest.xml
+++ b/extras/NetworkGraphicsDemo/Builds/Android/app/src/main/AndroidManifest.xml
@@ -2,7 +2,8 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0.0"
           package="com.juce.NetworkGraphicsDemo">
-  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:anyDensity="true"/>
+  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:anyDensity="true"
+                    android:xlargeScreens="true"/>
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
diff --git a/extras/NetworkGraphicsDemo/Builds/LinuxMakefile/Makefile b/extras/NetworkGraphicsDemo/Builds/LinuxMakefile/Makefile
index 18a67b5456..2b7d2e984c 100644
--- a/extras/NetworkGraphicsDemo/Builds/LinuxMakefile/Makefile
+++ b/extras/NetworkGraphicsDemo/Builds/LinuxMakefile/Makefile
@@ -41,7 +41,7 @@ ifeq ($(CONFIG),Debug)
 
   JUCE_CFLAGS += $(JUCE_CPPFLAGS) $(TARGET_ARCH) -g -ggdb -O0 $(CFLAGS)
   JUCE_CXXFLAGS += $(JUCE_CFLAGS) -std=c++14 $(CXXFLAGS)
-  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) -L/usr/X11R6/lib/ $(shell pkg-config --libs alsa x11 xinerama xext freetype2 webkit2gtk-4.0 gtk+-x11-3.0 libcurl) -lrt -ldl -lpthread -lGL $(LDFLAGS)
+  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) -L/usr/X11R6/lib/ $(shell pkg-config --libs alsa x11 xinerama xext freetype2 webkit2gtk-4.0 gtk+-x11-3.0 libcurl) -fvisibility=hidden -lrt -ldl -lpthread -lGL $(LDFLAGS)
 
   CLEANCMD = rm -rf $(JUCE_OUTDIR)/$(TARGET) $(JUCE_OBJDIR)
 endif
diff --git a/extras/NetworkGraphicsDemo/Builds/MacOSX/NetworkGraphicsDemo.xcodeproj/project.pbxproj b/extras/NetworkGraphicsDemo/Builds/MacOSX/NetworkGraphicsDemo.xcodeproj/project.pbxproj
index 2a3a20b3d7..c64f2a2335 100644
--- a/extras/NetworkGraphicsDemo/Builds/MacOSX/NetworkGraphicsDemo.xcodeproj/project.pbxproj
+++ b/extras/NetworkGraphicsDemo/Builds/MacOSX/NetworkGraphicsDemo.xcodeproj/project.pbxproj
@@ -694,7 +694,6 @@
 					"JucePlugin_Build_Standalone=0",
 					"JucePlugin_Build_Unity=0",
 				);
-				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				HEADER_SEARCH_PATHS = (
 					"../../JuceLibraryCode",
@@ -737,11 +736,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
@@ -785,10 +785,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
diff --git a/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj b/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj
index 99d26bb39c..158d4fb924 100644
--- a/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj
+++ b/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj
@@ -1986,6 +1986,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\audio_io\juce_SystemAudioVolume.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiDevices.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_MidiDataConcatenator.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\sources\juce_AudioSourcePlayer.h"/>
diff --git a/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj.filters b/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj.filters
index 0181b46d2c..027b765c3a 100644
--- a/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj.filters
+++ b/extras/NetworkGraphicsDemo/Builds/VisualStudio2019/NetworkGraphicsDemo_App.vcxproj.filters
@@ -2517,6 +2517,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h">
       <Filter>JUCE Modules\juce_audio_devices\midi_io</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h">
+      <Filter>JUCE Modules\juce_audio_devices\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h">
       <Filter>JUCE Modules\juce_audio_devices\native</Filter>
     </ClInclude>
diff --git a/extras/NetworkGraphicsDemo/Builds/iOS/NetworkGraphicsDemo.xcodeproj/project.pbxproj b/extras/NetworkGraphicsDemo/Builds/iOS/NetworkGraphicsDemo.xcodeproj/project.pbxproj
index 69eb61843e..3bd8e1337a 100644
--- a/extras/NetworkGraphicsDemo/Builds/iOS/NetworkGraphicsDemo.xcodeproj/project.pbxproj
+++ b/extras/NetworkGraphicsDemo/Builds/iOS/NetworkGraphicsDemo.xcodeproj/project.pbxproj
@@ -731,7 +731,6 @@
 					"JucePlugin_Build_Standalone=0",
 					"JucePlugin_Build_Unity=0",
 				);
-				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				HEADER_SEARCH_PATHS = (
 					"../../JuceLibraryCode",
@@ -773,11 +772,12 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
@@ -823,10 +823,12 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
diff --git a/extras/Projucer/Builds/LinuxMakefile/Makefile b/extras/Projucer/Builds/LinuxMakefile/Makefile
index 65fd56aa1d..3e691f2b0c 100644
--- a/extras/Projucer/Builds/LinuxMakefile/Makefile
+++ b/extras/Projucer/Builds/LinuxMakefile/Makefile
@@ -41,7 +41,7 @@ ifeq ($(CONFIG),Debug)
 
   JUCE_CFLAGS += $(JUCE_CPPFLAGS) $(TARGET_ARCH) -g -ggdb -O0 $(CFLAGS)
   JUCE_CXXFLAGS += $(JUCE_CFLAGS) -std=c++11 $(CXXFLAGS)
-  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) $(shell pkg-config --libs x11 xinerama xext freetype2 webkit2gtk-4.0 gtk+-x11-3.0) -lrt -ldl -lpthread $(LDFLAGS)
+  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) $(shell pkg-config --libs x11 xinerama xext freetype2 webkit2gtk-4.0 gtk+-x11-3.0) -fvisibility=hidden -lrt -ldl -lpthread $(LDFLAGS)
 
   CLEANCMD = rm -rf $(JUCE_OUTDIR)/$(TARGET) $(JUCE_OBJDIR)
 endif
diff --git a/extras/Projucer/Builds/MacOSX/Projucer.xcodeproj/project.pbxproj b/extras/Projucer/Builds/MacOSX/Projucer.xcodeproj/project.pbxproj
index 598f6e1282..eba583f020 100644
--- a/extras/Projucer/Builds/MacOSX/Projucer.xcodeproj/project.pbxproj
+++ b/extras/Projucer/Builds/MacOSX/Projucer.xcodeproj/project.pbxproj
@@ -3283,7 +3283,6 @@
 					"JucePlugin_Build_Standalone=0",
 					"JucePlugin_Build_Unity=0",
 				);
-				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				HEADER_SEARCH_PATHS = (
 					"../../JuceLibraryCode",
@@ -3326,11 +3325,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
@@ -3374,10 +3374,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
diff --git a/extras/UnitTestRunner/Builds/LinuxMakefile/Makefile b/extras/UnitTestRunner/Builds/LinuxMakefile/Makefile
index 091f7798a1..846293693b 100644
--- a/extras/UnitTestRunner/Builds/LinuxMakefile/Makefile
+++ b/extras/UnitTestRunner/Builds/LinuxMakefile/Makefile
@@ -41,7 +41,7 @@ ifeq ($(CONFIG),Debug)
 
   JUCE_CFLAGS += $(JUCE_CPPFLAGS) $(TARGET_ARCH) -g -ggdb -O0 $(CFLAGS)
   JUCE_CXXFLAGS += $(JUCE_CFLAGS) -std=c++14 $(CXXFLAGS)
-  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) -L/usr/X11R6/lib/ $(shell pkg-config --libs alsa x11 xinerama xext freetype2 webkit2gtk-4.0 gtk+-x11-3.0 libcurl) -lrt -ldl -lpthread -lGL $(LDFLAGS)
+  JUCE_LDFLAGS += $(TARGET_ARCH) -L$(JUCE_BINDIR) -L$(JUCE_LIBDIR) -L/usr/X11R6/lib/ $(shell pkg-config --libs alsa x11 xinerama xext freetype2 webkit2gtk-4.0 gtk+-x11-3.0 libcurl) -fvisibility=hidden -lrt -ldl -lpthread -lGL $(LDFLAGS)
 
   CLEANCMD = rm -rf $(JUCE_OUTDIR)/$(TARGET) $(JUCE_OBJDIR)
 endif
diff --git a/extras/UnitTestRunner/Builds/MacOSX/UnitTestRunner.xcodeproj/project.pbxproj b/extras/UnitTestRunner/Builds/MacOSX/UnitTestRunner.xcodeproj/project.pbxproj
index 101d51cc80..f3a25509a7 100644
--- a/extras/UnitTestRunner/Builds/MacOSX/UnitTestRunner.xcodeproj/project.pbxproj
+++ b/extras/UnitTestRunner/Builds/MacOSX/UnitTestRunner.xcodeproj/project.pbxproj
@@ -751,7 +751,6 @@
 					"JucePlugin_Build_Standalone=0",
 					"JucePlugin_Build_Unity=0",
 				);
-				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				HEADER_SEARCH_PATHS = (
 					"../../JuceLibraryCode",
@@ -793,11 +792,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_TESTABILITY = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
@@ -841,10 +841,12 @@
 				CODE_SIGN_IDENTITY = "";
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = NO;
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = YES;
 				GCC_MODEL_TUNING = G5;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_CHECK_SWITCH_STATEMENTS = YES;
diff --git a/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj b/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj
index a6ada50811..c0509ef6f2 100644
--- a/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj
+++ b/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj
@@ -2154,6 +2154,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\audio_io\juce_SystemAudioVolume.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiDevices.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_MidiDataConcatenator.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\sources\juce_AudioSourcePlayer.h"/>
diff --git a/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj.filters b/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj.filters
index e7fc4f9936..3e77d7b473 100644
--- a/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj.filters
+++ b/extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj.filters
@@ -2775,6 +2775,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h">
       <Filter>JUCE Modules\juce_audio_devices\midi_io</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h">
+      <Filter>JUCE Modules\juce_audio_devices\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h">
       <Filter>JUCE Modules\juce_audio_devices\native</Filter>
     </ClInclude>
diff --git a/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj b/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj
index 9da5d1f4e3..d89bbe596e 100644
--- a/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj
+++ b/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj
@@ -2154,6 +2154,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\audio_io\juce_SystemAudioVolume.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiDevices.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_MidiDataConcatenator.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\sources\juce_AudioSourcePlayer.h"/>
diff --git a/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj.filters b/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj.filters
index 968333e781..aea4e3a466 100644
--- a/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj.filters
+++ b/extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj.filters
@@ -2775,6 +2775,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h">
       <Filter>JUCE Modules\juce_audio_devices\midi_io</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h">
+      <Filter>JUCE Modules\juce_audio_devices\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h">
       <Filter>JUCE Modules\juce_audio_devices\native</Filter>
     </ClInclude>
diff --git a/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj b/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj
index 4474794535..60566b10c0 100644
--- a/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj
+++ b/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj
@@ -1962,6 +1962,7 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\audio_io\juce_SystemAudioVolume.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiDevices.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_MidiDataConcatenator.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\sources\juce_AudioSourcePlayer.h"/>
diff --git a/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj.filters b/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj.filters
index b521de4def..659f396597 100644
--- a/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj.filters
+++ b/extras/WindowsDLL/Builds/VisualStudio2019/WindowsDLL_StaticLibrary.vcxproj.filters
@@ -2484,6 +2484,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\midi_io\juce_MidiMessageCollector.h">
       <Filter>JUCE Modules\juce_audio_devices\midi_io</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_android_HighPerformanceAudioHelpers.h">
+      <Filter>JUCE Modules\juce_audio_devices\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_audio_devices\native\juce_ios_Audio.h">
       <Filter>JUCE Modules\juce_audio_devices\native</Filter>
     </ClInclude>