REAPER updates are evolutionary, not revolutionary. REAPER 4 is not a radically new experience from REAPER 3, but adds a number of useful new features, ease of use improvements, and even more of that legendary REAPER customizability.
Tweak, correct, and mangle audio with pitch envelopes, which can be applied to individual media items.

Extended information

Create fully automated surround mixes with multichannel track metering and the highly flexible ReaSurround plug-in. Apply rotations, transformations, and diffusions, and even automate the positions of the speakers themselves.
Batch rendering wildcards provide sound designers with unprecedented flexibility when generating sound files in bulk.

Manage project media and FX with the Project Bay, where you can collect, organize, and edit a list of resources that you are using, or might use, for different types of projects.

- Record audio and MIDI from multiple inputs simultaneously
- Layer recorded tracks and takes over previous recordings
- Edit recordings in almost any imaginable way
- Hundreds of audio and MIDI processing effects included, or choose from thousands of third-party effects
- All editing and effects are completely non-destructive

REAPER works with almost any hardware and can be used in combination with a vast universe of other software and plug-ins.

Take advantage of REAPER's full functionality using only your current computer and a microphone, or use REAPER to drive an entire professional recording studio.

Technical specifications

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
Native bridging and firewalling: run Win32 plug-ins in REAPER x64, maximize RAM utilization, protect against plug-in crashes
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

- 64-bit ReaPlugs Suite
Unlimited multiband EQ with draggable nodes
Graphical FFT EQ/dynamics processing
Technical and multiband compression
Flexible, open-format convolution reverb
Real-time pitch correction, with Elastique 2 Pro built in
Multitap delay, basic synthesizer, sample player, vocoder, algorithmic reverb, and more
Special-use plug-ins to virtualize outboard hardware, stream audio, connect to NINJAM servers, and more
Includes the JS audio and midi plug-in scripting engine, and hundreds of user-programmable effects


- Intangibles
REAPER starts and loads fast - be ready to record in just a few seconds
Portable - put REAPER in your pocket and run it from a USB key or other removable media
Tightly coded - installer is only a few MB, updates can be installed in less than a minute
Rapid, efficient development - new features and optimizations are added quickly and often
Very active, enthusiastic, and helpful user forum, get help quickly
Fantastic and readable user-created user guide
An honest business model that aims to provide the best possible user experience