Velvet Machine

Velvet Machine is an audio effect based on real-time convolution with enveloped velvet noise. Here is what it can do:

  • Stretch and blur out even short sounds to lengths of up to 10 seconds
  • Produce reverb-like textures with flexible volume envelope (including reverse, fading in and out, pulsating etc.)
  • Work as a variable density random multi-tap delay (bordering on granular-like sounds)

Note: Velvet Machine is a CPU-intensive effect. A minimum of 5th Gen iPad, iPhone 6s or 1st Gen iPhone SE is required to run a single instance at maximum settings. With shorter times and/or lower densities CPU use is proportionally lower, but can still be relatively high.

Velvet Machine includes a functional standalone app, however it’s mainly intended to be used as an AUv3 plugin app extension in a host app such as GarageBand, AUM, Cubasis and others. It does not support the now deprecated Inter-App Audio.



  • Flexible volume envelope with arbitrary number of segments and curvature
  • Effect time ranging from 50 ms to 10 s
  • Response density adjustable from 1 to 2000 repeats per second
  • Predelay up to 1 s
  • Host tempo sync for time and predelay parameters
  • High cut and low cut filters for the effected signal
  • Mix adjustable from 100% dry to 100% wet with no dry signal
  • Mix Lock to switch presets while keeping the dry/wet mix constant
  • 20+ factory presets to get you started