REAPER 5.6.0

What's new in this version:

Automation items:
- add option to disable envelope outside of automation items (automation-item-only mode)
- support preview in media explorer
- support various context menu actions from media explorer
- fix potential hang when populating submenus
- add automation item double-click mouse modifier to load saved automation item

Peaks:
- add display settings option to rectify peaks/waveforms
- add display settings option square-root-scale peaks

Spectral editing:
- clear spectral edit selection on item click
- separate controls for fade in/out/low/high rather than just time/frequency
- shift+drag of edge adjusts fade of that edge

Envelopes:
- add option to always create new automation item when writing automation (always enabled in automation-item-only mode)
- change bezier curve smoothness calculation so that curves are less sensitive to changes in surrounding points (existing projects are unaffected)
- add theme color for unselected automation item
- fix activating receive envelopes from envelope dialog
- fix end point behavior of action to insert four points at time selection
- generally restrict mute envelope points to on or off state
- respect "ignore mousewheel on track panel faders" for envelope control panels
- show move guides for automation item edits
- in automation-item-only mode, chase previous automation item value on seek

Solo:
- improve hardware send behavior when soloed track sending to another soloed track
- improve solo-in-place behavior for receives on folder tracks
- improve solo-in-place behavior when both sides of a send are soloed
- add option for unsoloed master/parent send when a soloed-in-place track sends to another soloed track

FX:
- fix ID collision in quick-add FX/FX chains menu
- allow VST plug-ins to override escape key, spacebar via effEditKeyDown

MIDI editor:
- add actions to navigate by channel, voice, staff
- obey mouse modifier setting to select/deselect other notes when inserting note on single click

Pitch shifter/timestretch:
- add new menu system for parameter modes
- add Rubber Band Library
- support loading extrashifter.dll/.dylib for developers

ReaScript:
- improve behavior of fade shape setting via SetMediaItemInfo_Value() with C_FADEINSHAPE, etc
- add GetUnderrunTime() API

Take FX:
- improve handling of PDC changes
- improve handling of PDC with master playspeed envelopes

Undo:
- prevent storing many duplicate empty state blocks in history
- support more efficient encoding of track configurations in history (new undo histories will not be loadable by 5.50 or earlier)

Mouse modifiers:
- fix actions to set default mouse modifiers for newly-added contexts

Preferences:
- move various solo/mute options to Audio, Mute/Solo tab

ReaEQ:
- optimize parameter updates

Tooltips:
- show correct tooltip when track muted due to envelope