Download free Part of NULL JSFX 2.5: 113 plugins, free and open source (MIT). Easiest with NULL JSFX Hub.

Listen

The same music with the Short Reverse Chops preset and without the plugin. Switch while it plays.

Controls

  • Buffer Length1 to 10 s — Length of the circular buffer that is read backwards
  • FilterOff / LP / BP / HP — Optional filter on the reversed signal: Off, Lowpass, Bandpass or Highpass
  • Filter Freq100 to 20000 Hz — Cutoff / centre frequency of the filter
  • Mix0 to 100% — Dry/wet blend

Best uses

  • Backwards textures from live input
  • Reverse swells on vocals and guitars
  • Filtered reverse ambience under a mix
  • Experimental sound design

Properties

Signal chain: Input → Circular Buffer (1–10 s) → Backwards Read → Optional RBJ Filter (Q 0.707, independent state per channel) → Mix → Output. The read head runs in reverse while the write head moves forward, so the reversed audio is continuous rather than chunked; filter changes do not reset the filter (no clicks); zero latency.

Formats

  • JSFXJSFX for REAPER, with REAPER's own sliders
  • GFXJSFX GFX for REAPER, with its own interface
  • VST3VST3 for any DAW
  • CLAPCLAP for any DAW

Factory presets

Short Reverse Chops · Backwards Swell · Dark Reverse Bed · Airy Reverse Layer · Telephone Reverse · Long Ambient Reverse · Reverse Only

In the FX chains and Rack presets

Glitch Band · Micro Grains · Reverse Reverb

See every FX chain

Try it

Try it on orOS StudioAdd it to a track in your browser, with its own interface. Nothing to install.