v6.57+dev0509 - May 9 2022
* Includes feature branch: improve experimental silent-track CPU reduction option to include FX tail length
* Includes feature branch: improved render loudness charts
* Includes feature branch: render individual tracks via master track using render matrix
* Includes feature branch: media item fixed lanes
* Includes feature branch: internal pin management overhaul for future extension
* Includes feature branch: media explorer user-defined tags
+ Drag and drop: fix color of insert new track indicator text [p=2556218]
+ Notation editor: minor adjustment to positioning of accidentals
+ ReaScript: make Lua handling of unspecified Optional const char* parameters consistent with other types/EEL2 [t=266405]
+ VST3: avoid duplicate entries when multiple instances of a VST3 UID16 are found with different filename parts [t=266362]
+ Video: fix rendering embedded AAC 4-channel audio when using Windows Media Foundation
+ Video: improve error messages when AVFoundation encoder fails to initialize
+ Video: support embedding multichannel audio in MP4 video when using Windows Media Foundation
+ Video: support rendering multichannel AAC via AVFoundation encoder
# FX: do not use new silence optimizations unless option is checked (was accidentally enabled during stop)
# FX: do not use silence optimizations on instruments
