REAPER is a powerful but sensible Windows application designed for the recording, arrangement, editing, mixing and rendering of audio files.

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REAPER provides a flexible but easy to use interface that is equally suited to amateurs and professionals alike. It requires no dongle, has no copy protection, and can be evaluated with full functionality.

Features of REAPER 2.54 :

- Portable - supports running from USB keys or other removable media
- 64 bit audio engine
- Excellent low-latency performance
- Stunning multiprocessor performance
- Direct multi-track recording to many formats including WAV/BWF/W64, AIFF, WavPack, FLAC, OGG, and MIDI.
- Extremely flexible routing
- Supports a wide range of hardware (nearly any audio interface, outboard hardware, many control surfaces)
- Support for VST, VSTi, DX, DXi effects
- ReaPlugs: high quality 64 bit effect suite
- Tightly coded - installer is just over 3MB
• Editing features:
- 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 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
- 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 and edit project via regions
- Automation envelopes
- See the full list of features here.

Changes in REAPER 2.54 :

- Dynamic split detection improvements
- Action: restore previous scroll position
- ReaVerb/ReaSamplomatic user/gdi object leak fixes
- Docked midi editor / fx window / mixer user object leak fixes
- Fixed looped-resampled-item glitches
- ReaSynDr, ReaSynth, ReaSamplomatic, ReaTune: smoother automation
- JS: fixed some issues with small increases in PDC
- Better wav/wv project filename setting when autosaving to .wav.rpp
- MIDI bank/program tracking fixes, duplicate note removal
- Display rendering updates
- Faster meter rendering
- Left/right edge adjustment snapping now respects X track-distances like moving
- Massive memory use reduction when using large numbers of MIDI files
- Fixed bugs removing automated parameters from ReaPitch/ReaDelay/etc
- Fixed end/start of item sample rounding for items with no fades
- OGG decoder: fixed subsample seeking accuracy
- Clipping fix for fully buffered peaks drawing mode