REAPER 6.50

What's new in this version:

Batch converter:
- support converting multiple files in parallel, utilizing multiple CPUs
- improve responsiveness and RAM usage when converting a large file list
- display the number of files and directories in the file list
- display progress bar if conversion takes more than a short time
- add when adding directory to file list, prompt to include subdirectories as well
- add option to use source subdirectory structure to create output directories
- add option to overwrite original files
- add option to suppress notification when finished
- add "save settings" button (does not save file list)
- reorganize controls to separate settings that are not included in presets
- include dither, noise shaping settings with presets
- add preset menu item to clear all converter settings
- add context menu actions to fit file list columns to screen, open input or output path, display input media properties
- after canceled conversion, convert and remove buttons offer to affect only converted/not-yet-converted files, or all files
- change default output file pattern to "$source-converted"
- delete incomplete output file on user cancel
- don't embed project-specific metadata
- preserve very long metadata correctly
- support $track, $tracknumber, $itemnumber wildcards, which will resolve to the project state at the time the media item was added to the file list
- update $samplerate wildcard correctly when changing sample rate
- allow FX to change processing channel count via pin connector dialog or JSFX channel mapper/downmixer
- fix lost FX tail setting when closing/reopening dialog

Media:
- improve zoomed-in peaks performance, especially on compressed media
- improve performance when using large block sizes and small media buffer settings

MIDI:
- do not remove duplicate note on/off events on import
- send note-off for active notes when seeking
- fix incorrect event duplication when exploding certain MIDI content by channel
- improve tick-to-sample rounding

Defaults:
- set default master track pan mode to stereo balance for new projects
- save/load master track pan law, pan mode with default project settings

FX:
- allow JSFX channel mapper/downmixer to change monitoring FX processing channel count
- improve behavior of FX drag/drop and TrackFX_CopyToTrack() etc when copying FX to a later slot on the same chain
- fix incorrect project save/load of parameter modulation and linking when applied to ReaPlugs (6.48 regression)

Media explorer:
- fix peaks display build restarting when seeking with output routed to a track
- improve seek behavior when autoplay, start-on-bar, and tempo matching are all enabled
- refresh display correctly after completing search

Render:
- ensure peaks display is fully updated for each rendered region
- fix enabling/disabling render loudness statistics from completed render dialog

VST:
- report channel index namespace context to plugins
- fix some misbehaving UI sizing plugins

Mouse modifiers:
- display and group media item lower half actions similarly to media item actions in preferences dropdown

ReaScript/JSFX:
- fix displaying strings containing multiple newlines in a row

Undo:
- ensure undo point is created after running action to remove content behind items

API:
- allow accelerators to hook keyboard for more windows including mixer, navigator, etc