REAPER 6.0 (64-bit)

What's new in this version:

MIDI editor:
- display and edit CC/velocity as dots and lines, CCs as linear and curved envelopes, similar to track envelopes
- add note-type buttons to default toolbar
- add option to display note length in velocity lane
- add option to move bank/program change events with notes
- add preference to automatically reduce CC events when drawing
- combine note properties and event properties into one modeless dialog
- add mouse modifiers to reset CC/velocity to default values
- make default CC event and CC lane mouse modifiers more like default envelope behaviors
- repopulate raw MIDI data display window when switching active media item

Theming:
- new Default 6.0 theme with theme adjuster script allowing for extensive customization of the new default theme
- layout DPI translation for HiDPI/Retina displays
- apply main window size area theme element only on mouseover
- improve theme rendering appearance when using custom UI scaling
- apply advanced preference UI scaling changes immediately
- replace tcp.dragdropchild with tcp.dragdropinfo [indent_sibling_track indent_child_track]
- add additional 8 WALTER font slots
- add support for midi_score_colormap, in addition to midi_note_colormap

Media items:
- add new "Beats (auto-stretch at tempo changes)" timebase
- add action to add stretch markers at project tempo changes
- add action to recalculate automatic stretch markers at project tempo changes
- add action to convert embedded source media transient information to transient guides
- optionally create transient guides on import for media with embedded transient information
- support calculating playback rate from user-supplied tempo or length in beats
- when copy/pasting items with stretch markers, preserve the original play rate

ReaScript:
- add MIDI_GetCCShape, MIDI_SetCCShape
- add support for CC shapes to MIDI_Get(Set)AllEvts
- add support for setting track playback offset value and attributes
- add support for user-defined note and track notation data that is not displayed
- fix setting MIDI meta-messages via API
- add reduce_open_files() utility function for users running up against open file handle limitations

FX:
- allow embedding some plug-in UIs into track and mixer control panels
- support embedding UIs for ReaEQ, ReaXComp, ReaComp, ReaSurround, and graphical JSFX
- add preference to display FX list on right side of FX chain window
- add preference to display add/delete buttons above list in FX chain window

macOS:
- Retina display arrange, ruler, MIDI editor, etc.
- use Metal display output on 10.11+ for various windows
- add options in Preferences/General/Advanced to disable Retina support, disable Retina for non-Retina theme elements
- support REX files on macOS Catalina
- work around appearance issues when user forces dark mode rendering for app (requires Metal to be enabled)

Render:
- include all options in "options and format" render presets
- optionally embed transient information into WAV or AIFF files
- support embedding tempo into AIFF files
- support rendering only selected regions in an existing region render matrix
- when enabled, embed exact tempo of rendered item/time

Defaults:
- enable Live FX multiprocessing by default
- enable track record monitoring on new tracks by default
- set volume envelopes to fader scaling by default

Dynamic split:
- add preset support
- overhaul and improvements to algorithm and gate handling
- retain settings after canceling the window

Media import:
- properly adjust length of imported media with embedded tempo when crossing project tempo changes
- support adjusting media based on tempo suggested by filename

Mouse modifiers:
- add double-click behaviors to reset CC value, curvature, edit properties
- add preference to draw/edit CC events immediately on mouse click

Multiprocessing:
- auto-detect up to 128 threads
- increase anticipative FX hard limit to 128 threads, live FX hard limit to 64 threads
- remove old 4.x scheduler mode, non-event synchronization modes

Performance:
- improve performance and reduce system resource consumption with large track counts
- add option in disk settings to periodically close excess open files
- add option to read peaks files under a certain size completely to RAM (to reduce open file count)

Resampling:
- added SSE2-optimized sinc calculation (from Theo Niessink)
- optimize and greatly improve quality of resampling for conversion between common rates

Toolbars:
- actions to switch last focused toolbar will default to switching main toolbar
- improve HiDPI/Retina support (toolbar_icons/ can have 150/ and 200/ subdirs)

Tracks:
- support positive or negative playback time offset without affecting PDC
- add action to bypass track playback offset
- add user preference for max MIDI playback speed to catch up to negative track playback offset

Windows:
- HiDPI awareness and display improvements (auto-rescale more UI when running HiDPI aware)
- improve appearance of docker, ReaPlugs, and other windows when resizing

Import:
- handle WAV and AIFF (Apple Loops) files containing transient information similarly to REX files

Main window:
- support positioning track control panels on right side of arrange

Menus:
- very lightly refresh main file/edit/view/insert menus

Modal windows:
- remember window positions (configurable option in preferences/general/advanced to tweak behavior)

Notation editor:
- support customized staff and note context menus

ReaFIR:
- add context menu mode configuration

REX:
- add option to ignore all embedded slice and tempo information

Routing:
- add track wiring view

VST3:
- support plugins that export MIDI note names