REAPER is a powerful Windows application for multitrack recording and editing of audio.

Extended information

Fast and powerful editing facilities:
* Tool-less mouse interface -- spend less time clicking
* Drag and drop files to instantly import them into a project
* Support for mixing any combination of file type/samplerate/bit depth/etc on each track
* Easily split, move, and resize items
* Each item has easily manipulated fades and volume
* Tab to transient support
* Configurable and editable automatic crossfading of overlapping items
* Per-item pitch shift and time stretch
* Arbitrary item grouping - easily group any number of items across any number of tracks (great for drum editing)
* Markers and envelopes can be moved in logical sync with editing operations
* Ripple editing - moving/deletion of items can optionally affect later items
* Multiple tempos and time signatures per project
* Ability to define regions, and quickly move/copy regions (and their contents), to quickly try out alternate arrangements
* Automation envelopes for volume, pan, and plug-in parameters
* Configurable locking settings (lock items, envelopes, loop selection, etc, independently)

Outstanding routing capabilities:
* Tracks can be viewed and used as normal tracks, or....
* Each track can function as a track and as a bus
* Each track can send to any number of other tracks (unlimited multiple parallel sends*)
* Each track can send to any number of hardware outputs (mono or stereo) for monitoring or analog mixing
* Every send can send audio and/or MIDI, audio sends can be before FX, after FX, or after the track's volume/pan faders
* Every send has its own volume/pan/phase controls
* Tracks can have as many as 64 channels, for easy support of multi-out VSTi, as well as enormous sidechain flexibility
* Routing Matrix window for easy viewing and changing of routing
* Feedback routing is supported

Powerful recording options:
* Direct multi-track recording to all supported formats, including WAV/W64/BWF, MIDI, WavPack, FLAC, and OGG
* Record monitoring allows you to run FX on inputs and route them while stopped and/or while recording
* Per-track record monitoring settings: off, on, tape auto style (monitoring when recording, not monitoring when playing)
* Per-track record mode selection (can record input, mixed track output, track MIDI output, or just monitor+route only)
* Change any track's record arming, input, monitoring, or record mode at any time (even while recording)
* Supports auto-punch in/out, and multi-item/multi-track auto-punch
* Supports looped recording adding takes
* Can record entire mixed (live) output
* Automatically add recorded items to any existing items as new takes
* Automatic gapless file switching to avoid 2GB/4GB filesystem limits

MIDI support:
* MIDI files can be inserted in any track
* Piano roll MIDI editor with velocity, pitch, and CC controls
* Support for multi-track recording/monitoring of any MIDI hardware input
* Any number of tracks can send to any MIDI hardware output
* Support for VSTi/DXi softsynths and VST MIDI fx
* Support for MIDI sending/receiving to ReWire devices
* Support for recording a track's output (audio or MIDI) independent of what input is selected (meaning you can record live the audio output of a softsynth from a MIDI source, or even more interestingly record the MIDI output of ReaGate from a live (audio) input)

Customizable user interface:
* Configurable shortcut keys -- customize the keyboard keys to work the way you are used to, or use REAPER's intuitive default mapping
* Color themes: change the way REAPER appears to meet your tastes, or choose one of nearly 50 themes included
* User arrangeable user interface. The following windows can be hidden, docked, or floated to meet your needs:
o Track mixer view
o Transport controls
o Undo history
o Media explorer
o Routing matrix
o Navigator
o FX browser
o Track FX chains
o Performance meter
o Big clock
o Virtual MIDI keyboard
o more!

Bundled Effects and 3rd party plug-in Support:
* Flexible FX chains allow unlimited FX per track*
* Automatic plug-in delay compensation (PDC)**
* Realtime FX processing
* Offline FX processing (Apply FX to item as new take)
* Realtime network FX processing (use spare machines on your local network for processing)
* Supports VST/VSTi plug-ins
* Supports DX/DXi plug-ins
* Supports ReWire enabled applications
* Includes ReaGate, a sidechain-enabled noisegate
* Includes ReaComp, a sidechain-enabled compressor
* Includes ReaEQ, a fast and very configurable EQ
* Includes ReaFIR, an FFT EQ+dynamics processor+noise reduction tool
* Includes ReaVerb, a convolution reverb
* Includes ReaTune, a tuner and pitch correction tool
* Include ReaInsert, which allows inserting hardware devices into FX chains as FX
* Includes many user-programmable Jesusonic effects
* For a more complete list, see the REAPER Technical Specifications

Extremely small footprint
REAPER is full featured, but small and FAST. It starts and closes fast, and is easily installed on new systems or on portable drives. Despite being lightweight, it can still utilize heavyweight hardware (including multiple CPU cores, network computers, and add-in DSP cards).

Easy to use
Equally usable by hobby users and professionals alike. Simply drag and drop one of many kinds of files in to edit existing material, or insert a track and arm it for recording. No complex project settings or definitions are required.

Wide open compatibility:
* Human readable and editable project file format
* Support for on-the-fly reading and writing of many common file formats, including WAV/W64/BWF, MID, AIFF, WavPack, FLAC, MP3 and OGG
* Support for consolidating track edits, to enable easy export of edited audio
* Support for rendering track stems, to enable easy export (with FX and automation)
* EDL import/export for both Samplitude and Vegas
* Includes ReaRoute, which enables sending/receiving of audio to/from most other ASIO enabled applications

Technical specifications

Media Support:
* Can natively decode:
o WAV/W64/BWF (8/16/20/24/32 bit PCM, 32/64 bit float)
o AIFF (8/16/20/24/32 bit PCM)
o WavPack
o FLAC
o OGG Vorbis
o MP3
o MIDI
o SYX
* Can natively record to/render to:
o WAV/W64/BWF
o AIFF
o WavPack
o FLAC
o OGG Vorbis
o MIDI
o MP3 (if lame_enc.dll installed)
o CUE/BIN (CD ISO)
* Can decode audio/preview video:
o AVI, WMV, MPG
o MOV (requires QuickTime)
* Support for any combination of source media of varying bit depth, sample rate, formats

Hardware Utilization:
* ASIO, WDM Kernel Streaming, WaveOut, and DirectSound support for playback and recording
* Supports any samplerate from 8khz to 192khz+*
* Advanced (highly effective) multi-processing support (can heavily utilize 2 or more processors)*
* MIDI input/output using standard Windows MIDI
* Support for some MIDI control surfaces (Behringer BCF2000, Frontier TranzPort and AlphaTrack, PreSonus FaderPort, and Mackie BabyHUI and MCU)
* Supports assigning MIDI events to actions, FX parameters
* Input/output channel name aliasing ("MOTU 896: Analog 1" becomes "Vocal Mic", etc)
* Supports ReWire to other ReWire enabled applications
* Supports ReWire slave mode for other applications
* ReaRoute: enables most ASIO-enabled applications to send/receive audio to/from REAPER
* ReaInsert: enables inserting external hardware anywhere in REAPER's FX chains, with full auto latency compensation
* Supports CD burning

Tracks / Routing:
* Support for an unlimited number of tracks*
* Volume, pan controls and envelopes per track and per send
* Project pan law configuration, per-track/per-send pan law override
* Every track can act as a bus, enabling extensive routing flexibility
* Unlimited send/receives per track*, with configurable parameters (pre-fx, post-fx, volume/pan adjustment/envelopes, mix to mono, phase, etc)
* Tracks can have one or more (mono or stereo) hardware sends, for analog mixing capability
* Industry leading Routing Matrix that enables you to quickly see and change routing, record inputs, and hardware outputs
* Fully routable/FX-able folder tracks that can contain and group tracks
* True 64-bit floating point end-to-end signal path (not just 64-bit summing)
* Support for feedback routing, if desired

Recording Facilities:
* Auto punch-in/punch-out functionality
* Multiple auto punch-in/punch-out functionality
* Record monitoring: always-on, always-off, or tape style auto monitoring
* Support for recording track audio output (including with routing in place)
* Support for recording track MIDI output
* Support for recording the mixed down signal of multiple tracks
* Support for arm/disarming inputs while recording
* Support for changing recording sources on the fly
* MIDI overdub/replace recording modes
* On the fly building of recorded item peaks
* Lots of control for to specify where recorded files are stored, on both system and per-project levels.

Editing Facilities:
* Realtime fading, crossfading, and auto-crossfading of items
* Multi-layer undo/redo with history window (works on all project settings including edits, routing, plug-ins, etc)
* Pitch shifting and time stretching per item
* Arbitrary item grouping
* Tab to transient support
* Highly configurable editing playback behavior (autoseeking to audition edits, etc)
* Ripple editing (in one track or in all tracks)
* Grid/snap support with highly configurable options
* Supports multiple time signatures and tempos per project
* Markers
* Regions, ability to move/copy regions (and all of their contents)
* Multiple takes per media item
* Piano roll MIDI editor for MIDI items
* Project playspeed control/envelope support (equivilent of changing tape speed, fully automateable)
* Optional Smooth Seeking (at marker/region or end-of-measure), for easy previewing of transitions

Plug-in Support:
* Flexible FX chains allow unlimited FX per track*
* Network FX support -- run FX on spare machines on your local network
* Automatic plug-in delay compensation (PDC)**
* Easy manipulation of FX via drag and drop or cut and paste
* Save/load FX chain to disk, can set a default track chain
* Envelopes for FX parameter automation
* FX parameter automation recording
* MIDI learn for FX parameters
* Supports VST/VSTi plug-ins:
o Support for 64-bit double precision plug-ins
o Support for plug-ins that output/process MIDI
o Support for tempo synchronized plug-ins
* Supports DX/DXi plug-ins
* Supports ReWire devices
* Supports inserting external hardware as plug-in FX, with automatic delay compensation
* Supports (and includes) user-programmable Jesusonic effects

Bundled Effects:
* ReaGate: a sidechain-capable noise gate with lookahead and hysteresis controls. ReaGate can also send MIDI events on gate open/close, for triggering samples/etc.
* ReaComp: a sidechain-capable configurable compressor with lookahead, configurable knee size, optional feedback mode, and configurable RMS window. ReaComp can be tweaked to sound like many popular hardware and software compressors.
* ReaEQ: a fast, configurable EQ, with support for any number of many kinds of filters.
* ReaFIR: an FFT-based EQ and dynamics processor. ReaFIR can perform as an EQ, but can also do very powerful per-band compression, noise removal, and gating.
* ReaVerb: a convolution reverb that lets you synthesize, load, and manipulate reverb impulses on the fly.
* ReaTune: a very fast and accurate instrument/vocal tuner, with automatic and manual correction options
* ReaSamplOmatic5000: a simple but powerful MIDI sampler that can be used for both drum triggering and as an instrument.
* ReaSynth: a tiny sine/square wave soft synthesizer
* ReaSynDr: a tiny "oldschool" style drum synthesizer
* Many Jesusonic effects, including: M/S encoder/decoder, delay, distortion, parameteric EQ, guitar amp simulation, chorus, flanger, phaser, tremolo, pitch shifter, and more!

Customizability:
* Track and project template support
* User creatable color themes
* Customizable icon themes
* User assignable and changeable hotkeys
* Extensive behavior options for letting users of other software adapt quickly
* Mixer, transport, media explorer, undo history, routing matrix, performance meters can be either docked, hidden, or undocked
* Template support to make it easy to load a project template and save it as a new project when you begin.
* Options for automatically backing up project files to alternate paths, timestamped versions, etc.
* Jesusonic FX can be edited and/or created on the fly, during program operation/playback/recording

Compatibility:
* Extensive rendering and consolidation options for easy export to other applications
* Support for a large number of industry standard file formats
* Vegas and Samplitude EDL text import/export

System Requirements:
* Minimum system: Windows 98/ME/2000/XP with 128MB RAM, 10MB free disk space, 800x600 in 256 colors or higher, Windows compatible sound hardware
* Recommended system: Windows 2000/XP with 1GB RAM, >1GB free disk space, 1280x1024 in 16.7M colors, ASIO sound drivers