Merge remote-tracking branch 'upstream/master' into darkaudacity

mac/Audacity.xcodeproj/project.pbxproj

src/AudioIO.cpp

src/Benchmark.cpp

src/BlockFile.cpp

src/Dependencies.cpp

src/FreqWindow.cpp

src/Menus.cpp

src/Mix.cpp

src/MixerBoard.cpp

src/Sequence.cpp

src/TrackArtist.cpp

src/TrackPanel.cpp

src/VoiceKey.cpp

src/WaveClip.cpp

src/WaveTrack.cpp

src/blockfile/LegacyBlockFile.cpp

src/commands/CompareAudioCommand.cpp

src/effects/Amplify.cpp

src/effects/AutoDuck.cpp

src/effects/BassTreble.cpp