diff --git a/modules/juce_audio_basics/midi/juce_MidiMessageSequence.cpp b/modules/juce_audio_basics/midi/juce_MidiMessageSequence.cpp
index effefbbb4f..94a6b9bcfd 100644
--- a/modules/juce_audio_basics/midi/juce_MidiMessageSequence.cpp
+++ b/modules/juce_audio_basics/midi/juce_MidiMessageSequence.cpp
@@ -29,6 +29,7 @@ MidiMessageSequence::MidiMessageSequence()
 MidiMessageSequence::MidiMessageSequence (const MidiMessageSequence& other)
 {
     list.addCopiesOf (other.list);
+    updateMatchedPairs();
 }
 
 MidiMessageSequence& MidiMessageSequence::operator= (const MidiMessageSequence& other)
@@ -52,17 +53,17 @@ void MidiMessageSequence::clear()
     list.clear();
 }
 
-int MidiMessageSequence::getNumEvents() const
+int MidiMessageSequence::getNumEvents() const noexcept
 {
     return list.size();
 }
 
-MidiMessageSequence::MidiEventHolder* MidiMessageSequence::getEventPointer (const int index) const
+MidiMessageSequence::MidiEventHolder* MidiMessageSequence::getEventPointer (const int index) const noexcept
 {
     return list [index];
 }
 
-double MidiMessageSequence::getTimeOfMatchingKeyUp (const int index) const
+double MidiMessageSequence::getTimeOfMatchingKeyUp (const int index) const noexcept
 {
     if (const MidiEventHolder* const meh = list [index])
         if (meh->noteOffObject != nullptr)
@@ -71,7 +72,7 @@ double MidiMessageSequence::getTimeOfMatchingKeyUp (const int index) const
     return 0.0;
 }
 
-int MidiMessageSequence::getIndexOfMatchingKeyUp (const int index) const
+int MidiMessageSequence::getIndexOfMatchingKeyUp (const int index) const noexcept
 {
     if (const MidiEventHolder* const meh = list [index])
         return list.indexOf (meh->noteOffObject);
@@ -79,12 +80,12 @@ int MidiMessageSequence::getIndexOfMatchingKeyUp (const int index) const
     return -1;
 }
 
-int MidiMessageSequence::getIndexOf (MidiEventHolder* const event) const
+int MidiMessageSequence::getIndexOf (MidiEventHolder* const event) const noexcept
 {
     return list.indexOf (event);
 }
 
-int MidiMessageSequence::getNextIndexAtTime (const double timeStamp) const
+int MidiMessageSequence::getNextIndexAtTime (const double timeStamp) const noexcept
 {
     const int numEvents = list.size();
 
@@ -97,17 +98,17 @@ int MidiMessageSequence::getNextIndexAtTime (const double timeStamp) const
 }
 
 //==============================================================================
-double MidiMessageSequence::getStartTime() const
+double MidiMessageSequence::getStartTime() const noexcept
 {
     return getEventTime (0);
 }
 
-double MidiMessageSequence::getEndTime() const
+double MidiMessageSequence::getEndTime() const noexcept
 {
     return getEventTime (list.size() - 1);
 }
 
-double MidiMessageSequence::getEventTime (const int index) const
+double MidiMessageSequence::getEventTime (const int index) const noexcept
 {
     if (const MidiEventHolder* const meh = list [index])
         return meh->message.getTimeStamp();
@@ -181,13 +182,13 @@ void MidiMessageSequence::addSequence (const MidiMessageSequence& other,
 }
 
 //==============================================================================
-void MidiMessageSequence::sort()
+void MidiMessageSequence::sort() noexcept
 {
     MidiMessageSequenceSorter sorter;
     list.sort (sorter, true);
 }
 
-void MidiMessageSequence::updateMatchedPairs()
+void MidiMessageSequence::updateMatchedPairs() noexcept
 {
     for (int i = 0; i < list.size(); ++i)
     {
@@ -226,7 +227,7 @@ void MidiMessageSequence::updateMatchedPairs()
     }
 }
 
-void MidiMessageSequence::addTimeToMessages (const double delta)
+void MidiMessageSequence::addTimeToMessages (const double delta) noexcept
 {
     for (int i = list.size(); --i >= 0;)
     {
diff --git a/modules/juce_audio_basics/midi/juce_MidiMessageSequence.h b/modules/juce_audio_basics/midi/juce_MidiMessageSequence.h
index d91ed8b246..b62940c2d0 100644
--- a/modules/juce_audio_basics/midi/juce_MidiMessageSequence.h
+++ b/modules/juce_audio_basics/midi/juce_MidiMessageSequence.h
@@ -91,47 +91,47 @@ public:
     void clear();
 
     /** Returns the number of events in the sequence. */
-    int getNumEvents() const;
+    int getNumEvents() const noexcept;
 
     /** Returns a pointer to one of the events. */
-    MidiEventHolder* getEventPointer (int index) const;
+    MidiEventHolder* getEventPointer (int index) const noexcept;
 
     /** Returns the time of the note-up that matches the note-on at this index.
         If the event at this index isn't a note-on, it'll just return 0.
         @see MidiMessageSequence::MidiEventHolder::noteOffObject
     */
-    double getTimeOfMatchingKeyUp (int index) const;
+    double getTimeOfMatchingKeyUp (int index) const noexcept;
 
     /** Returns the index of the note-up that matches the note-on at this index.
         If the event at this index isn't a note-on, it'll just return -1.
         @see MidiMessageSequence::MidiEventHolder::noteOffObject
     */
-    int getIndexOfMatchingKeyUp (int index) const;
+    int getIndexOfMatchingKeyUp (int index) const noexcept;
 
     /** Returns the index of an event. */
-    int getIndexOf (MidiEventHolder* event) const;
+    int getIndexOf (MidiEventHolder* event) const noexcept;
 
     /** Returns the index of the first event on or after the given timestamp.
         If the time is beyond the end of the sequence, this will return the
         number of events.
     */
-    int getNextIndexAtTime (double timeStamp) const;
+    int getNextIndexAtTime (double timeStamp) const noexcept;
 
     //==============================================================================
     /** Returns the timestamp of the first event in the sequence.
         @see getEndTime
     */
-    double getStartTime() const;
+    double getStartTime() const noexcept;
 
     /** Returns the timestamp of the last event in the sequence.
         @see getStartTime
     */
-    double getEndTime() const;
+    double getEndTime() const noexcept;
 
     /** Returns the timestamp of the event at a given index.
         If the index is out-of-range, this will return 0.0
     */
-    double getEventTime (int index) const;
+    double getEventTime (int index) const noexcept;
 
     //==============================================================================
     /** Inserts a midi message into the sequence.
@@ -185,13 +185,13 @@ public:
         will scan the list and make sure all the note-offs in the MidiEventHolder
         structures are pointing at the correct ones.
     */
-    void updateMatchedPairs();
+    void updateMatchedPairs() noexcept;
 
     /** Forces a sort of the sequence.
         You may need to call this if you've manually modified the timestamps of some
         events such that the overall order now needs updating.
     */
-    void sort();
+    void sort() noexcept;
 
     //==============================================================================
     /** Copies all the messages for a particular midi channel to another sequence.
@@ -224,7 +224,7 @@ public:
     /** Adds an offset to the timestamps of all events in the sequence.
         @param deltaTime    the amount to add to each timestamp.
     */
-    void addTimeToMessages (double deltaTime);
+    void addTimeToMessages (double deltaTime) noexcept;
 
     //==============================================================================
     /** Scans through the sequence to determine the state of any midi controllers at