REAPER is a digital audio workstation: a complete multitrack audio and MIDI recording, editing, processing, mixing, and mastering environment.

Fast, Powerful Editing

• Drag and drop to import, arrange, and render
• Freely mix audio, MIDI, video, still image media on any track
• Easily move, split, glue, resize, trim, loop, time stretch, pitch shift, fade, crossfade, slip, snap to grid, without switching tools
• Intuitive zoom, scroll, scrub, jog, tab to audio transient, MIDI navigation
• Simple and powerful nested folder system allows group editing, routing, bussing, all in one step
• Full automation recording, playback, and editing support for track controls and plug-ins
• Easily manage tempo, time signature, and varispeed changes
• Separate audio or MIDI into freely arrangeable takes and lanes for easy comping
• Easily copy or move regions, to quickly try out alternate arrangements

Plug-in Support

• Insert almost any third-party audio or MIDI plug-in: VST, VSTi, DX, DXi, AU (OSX only), JS
• ReWire (audio and MIDI) any capable application for even more flexibility
• Fully automatic plug-in delay compensation (PDC)
• Sidechain any plug-in, even if the plug-in does not natively support sidechaining
• Apply FX in real time, or non-destructively render FX output
• Real-time network FX processing: use other local machines as an FX farm

What's New:

• API:
  • fixed RenderFileSection() return value
  • plugin extensions can register MIDI/OSC learn-able actions .
  • plugin extensions can register actions in any section .
  • plugin extensions can register toggle actions in any section
• Localization:
  • fixed browse for directory issues .
  • fixed Screensets/Layouts shortcut issues
  • allowed localization of toolbar names
  • various fixes ........
• FX:
  • fix for FX browser context menu issues on secondary monitors .
  • fixed timing issues with looped PDC+MIDI .
  • optional auto-positioning of FX chains and floating FX windows, improved default positioning
• JSFX:
  • added support for reading various media types that REAPER supports (including FLAC, WavPack, etc)
  • gfx_arc() overdraw fixes
• MIDI editor:
  • display on/off states in the action list when relevant
  • added action to show list of MIDI note name files at cursor
  • list recent note name files in File/Customize note names menu
• Mouse modifiers:
  • added separate context for marker/region lanes (above the timeline)
  • added new scroll/zoom actions
• Render wildcards:
  • improved support for abbreviated wildcards to match older versions .
  • hardened $itemnumber wildcard .
• Ruler:
  • changes to timeline appearance, customizable distance between timeline text labels
  • new minimal-beats view mode
  • separate theme colors for measure vs other markings
• Stability:
  • fixed possible crash on exit when using RX2 files
  • fixed multiproject related stability issues (JeffOS is awesome)
  • reverted change from 4.611 which caused some VSTs to crash on exit
• Actions: fixed typo in "Go to end/start of loop" action names .
• Envelopes: cut/paste respects project and track timebase .
• MIDI: fixed various timing problems with playback, display, and export when the user creates a project tempo map containing partial measures .
• Preferences: consolidated TCP, VU meter, and fader preferences onto one page
• ReaScript: avoid excess Undo_OnStateChange() calls and stale undo blocks for non-deferred scripts
• Toolbars: allow customizing the names of builtin toolbars
• VST: fixed MIDI output disable mode
• Windows: avoid msvcrt.dll dependency in win32 builds