REAPER 6.54 (64-bit)

What's new in this version:

FX:
- add per-FX instance and per-FX chain oversampling options (if both chain and instance are set, the higher of the two is used)
- change Add-FX window pane configuration (horizontal vs vertical layout) via context menu, don't change configuration on double-clicking the divider
- improve value editing and default values for wet/bypass/delta envelopes
- when opening FX chain for a track that has no FX, by default show the Add-FX window rather than the empty FX chain window (option in Preferences/Plug-Ins)

Media items:
- replace "show overlapping items in lanes" option with "offset overlapping items vertically"
- add preferences for item vertical overlap percentage and opacity
- add preference for minimum height to display peaks
- change default item mix behavior to "items always mix", existing projects and user default project settings are unaffected
- don't display cursor feedback when mouse is over controls of locked items
- update mouse click prioritization to prefer opaque unselected items over transparent selected items (prevent clicking controls that are behind other items)
- improve interaction between preferences to show/hide free item positioning, show/hide media item labels at certain track heights
- locked items do not autocrossfade with unlocked items
- prevent editing take envelopes when item is locked

Razor edits:
- add click-context mouse modifiers to move areas up or down without contents
- improve stretch-editing automation items in ripple-edit mode
- razor edits on free item positioning lanes snap to item tops/bottoms, do not necessarily span the entire track height
- add "razor edits affect all track envelopes", separate from "move envelope points with media items"
- fix incorrect group selection edge highlight when razor editing
- fix behavior when stretching right edge of razor edit with ripple edit enabled and automation items later on the track
- fix flickering display after running action to cut selected area of items

Free item positioning:
- fix minor time selection display issue
- glued items inherit FIPM y-positioning
- improve interaction between free item size edits and mouse modifiers (remove hardcoded behaviors of some modifier keys)
- when recording in free item positioning mode, only adjust existing item y-positions if necessary

MIDI editor:
- fix editing left edge of notes, inserting new CC events, some other behaviors when editing looped item with start offset
- fix note velocity sweep-editing when moving the mouse quickly
- reload custom .ReaScale function when opening a new project
- restore grid type properly in quantize window when quantizing with swing

ReaScript:
- add GetSetMediaTrackInfo("I_FREEMODE"), deprecate GetSetMediaTrackInfo("B_FREEMODE")
- add GetSetMediaTrackInfo("P_RAZOREDITS_EXT"), to get/set free item positioning bounds
- fix GetThingFromPoint handling of hidden envelopes
- fix reaper.AddRemoveReaScript() on Windows when script path contains forward slashes

Actions:
- account for reverse volume grouping when running action to adjust track volume
- add actions to move media items to/from hidden child track

Audio Units:
- improve resizing behavior of AUv3 plug-ins
- fix potential AUv3 crash when plug-in outputs MIDI events on Monterey
- call AudioUnitUninitialize() when unloading

Batch converter:
- update display immediately after removing all files
- fix in-place conversion for non-boot macOS volumes

Import:
- add option in Preferences/Media to target the top part of a track to insert new track(s) to receive the media
- on drag-import, offer to replace media source only if snapped start position of imported media is within an existing media item

Media explorer:
- add action to delete file with prompting
- fix updating database metadata when database is not on the local filesystem

Projects:
- support loading multiple projects in recovery mode
- master hardware outputs are saved with project default settings

ReaSurroundPan:
- fix action to set input names from sending tracks when FX pin mapping has been customized
- improve display when configuration changes so that inactive channels/speakers are displayed in the list
- when inserting as take FX, increase FX output pin count to match track channel count if needed

Recording:
- respect option to always add takes to new recording when looping
- when preference enabled to add recorded media at each loop, defer adding media during mouse editing

- Render:
- display graph of loudness values of rendered file in HTML statistics view
- apply PDC to rendered output when master track FX is set to ignore PDC or hardware-output-PDC

Tempo envelope:
- context menu action to insert point respects default point shape (linear or square, curved shapes are not allowed on tempo envelopes)
- don't snap to beats when editing points if project snap is disabled
- warn if user enters time signature numerators/denominators out of range

ARA:
- update API to version 2.1, with ARM support

Logical sorting:
- improve sort order of various characters in Media Explorer and other windows (underscore, hyphen, number, UTF-8, alpha)

Media buffering:
- update playback more promptly (bypass some media buffering) when changing item takes, mute states

Menus/Actions:
- update menus and actions to refer to "takes" instead of "take lanes", to avoid ambiguity

Metadata:
- support WAVEEXT channel layout tag "L R C LFE Ls Rs" instead of "L R C LFE Lsd Rsd"

MIDI inline editor:
- improve action window targeting behavior

ReaControlMIDI:
- increase length of sysex dump displayed in log from 1k to 8k bytes

ReaEQ:
- expose global gain as an automatable parameter

ReaInsert:
- do not allow processing if FX oversampling is used

Reverse items:
- improve behavior of reverse items as new take with audioless video items

Super8:
- allow up to 500ms of RDC

Theme:
- add theme overlay color, blend mode for muted/unsoloed/inactive or locked media items and tracks

Track manager:
- display track channel count
- Tracks/media items/razor edits
- many internal changes to support future media item lane functionality

Video:
- fix behavior when enabling/disabling audio on all project video sources

Windows:
- add additional uninstall information to system