Metronome: fix project metronome pattern not applying immediately, regression from 5.18 .
Notation editor: fix potential crash when entering lyrics outside the bounds of the media item .
VST: better behavior when manually re-scanning shell plug-ins
add MIDI notation editor!
handle most mouse and keyboard insert/edit behaviors identically to existing MIDI editor
save notation data with project MIDI; notation-specific import/export will come later ...
make @serialize faster and use less memory
add WigWare Multi-Channel VU Meter
add undo point when renaming source media
improve handling of zero-length items .
fix heavily-looped, resampled items . ...
Notation editor: NEW in 5.20 - Compose and edit MIDI as musical notation, or view and edit recorded MIDI. Flexible mouse editing, key signatures, multiple clefs, dynamics, voices, lyrics, tuplets, articulation, ornaments, slurs, and more.
FX:VST3 support, sample-accurate automation for VST3 and JSFX, FX browser improvements.
ReaScript:API and scripting improvements, including a built-in development environment for creating and debugging scripts in Lua, EEL, or Python. Create anything from simple macros, to complex new functionality.
Control grouping:Flexible, automatable VCA control. Link groups of track controls together at any point in the signal flow.
Video:Many improvements to video support and performance, including real-time programmable track and item effect processing.
FX parameter automation:Full automation and MIDI/OSC learn support for per-take FX, improved FX envelope and modulation management via the Project Bay, increased automation recording speed.
New GUI layouts, Media Explorer improvements, metronome beat patterns, Opus support, MIDI note-off editing, new volume envelope modes, new actions and API functions, and many other fixes and improvements