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Sequencer by Audio Vitamins
Mac OS XMac 64-BitWindowsWindows x64 VST VST3 Audio Unit
What is it?
Operating System Availability
 1.1.2  Download
 1.1.2  Download
License & Installation Method
Instant (Challenge Response / Authorization Code)
What does this mean?
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Stochas is a revolutionary new type of step sequencer that has a unique randomisation engine. Designed to work either in mono or polyphonic modes the engine will select from a set of user inputted notes and takes into consideration the probability set for each, this means Stochas can be used to create evolving melodies, rich sounding string and synth sections, unique bass lines and even chaotic yet looping drum patterns, perfect for live and recorded performances. Chord input and predefined scales, make editing and inputting patterns quick and easy, without any knowledge needed of music theory.

With the ability to create polyrhythmic and polymetric patterns up to 64 steps in length, independently on each of the 4 layers, Stochas can create interesting ideas for your next musical project, be it a Phillip Glass style classical piece with varying rhythmical and metric sequences playing against each other, to a polymeric dance style project that has more life and rhythm than the standard 4/4 patterns. Patterns can be chained and created so that little phrases can be triggered randomly during the playback sequence, this can also be used to prevent repetition of the same note if using Stochas to write a bass line or to keep the pattern evolving.

With the groove template editor, you have total control over the timing and feel of the playback in Stochas, these can also be saved and loaded into other sessions, allowing you to recreate the same feel from track to track easily. MIDI input control means that you can use any hardware controller or another MIDI channel to control Stochas, allowing for live performance control of the polymeric lengths, transpositions, the bias of the maximum number of notes played.


  • Randomisation engine works in both mono and polyphonic modes.
  • Groove templates with export and import function.
  • Chord input.
  • Predefined key and scales, including custom import.
  • Note chains for phrase creation.
  • up to 64 grid steps and 125 rows.
  • Humanization control.
  • Polyrhythmic and polymetric control.
  • 4 layers and 8 patterns.
  • Midi input for live performance control.


User Reviews Average user rating of 2.00 from 1 reviewAdd A Review

Reviewed By Adr1an0
July 3, 2017

I would give this closer to a 10 if it weren't for the fact that it doesn't work properly in Ableton.

It's remarkable, given the popularity of Ableton, that this company released Stochas without getting to the bottom of the issue.

On their support forum they say "they're looking into it" but that reply was May 2017 and it's now early July.

One of the selling points of Stochas are its 4 layers that can work in parallel to enrichen your sound/melodies etc.

To do this layer 1-4 are routed to MIDI channel 1-4.

On a You tube demo a bloke using Kontakt does this. However Ableton users can't use this functionality. There were 2 other people like me who had written on the Audio vitamin website about this.

The plug in does nearly everything I want for my experimental installation type soundscapes, and I have a workaround for this issue where I just have 4 instances of Stochas each routing to a separate synth/device.

However at $50 this shouldn't have been necessary and the really nice functionality they created for working across layers is lost using my workaround. The functionality is that the notes of other layers are 'shadowed' as you work in parallel layers. It makes it easy to make/see the possible polyrhythmic patters.

So in conclusion. A potentially 'awesome' tool is handicapped. I will come back here and give it a 10 if they fix this issue in an update. But after 2 months since they were "looking into it", I am not convinced that's going to happen.

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