Stepper Acid - Digitally Controlled Step Sequencer
Stepper Acid Front Panel Flat

Designed by and for musicians, Stepper Acid was born out of our need for a modern step-sequencer.

Dual microcontroller design ensures tight timing: one runs the sequencer, the other the front panel interface.


  • 16-step sequencer
    With adjustable pattern length
  • Adjustable analogue slide
  • Song mode for pattern chaining
  • Stores up to 40 patterns
  • Detach mode for playing one pattern while entering another
  • 0-5V range CV (5 octaves)
  • Gate and accent output
    5V or 12V selectable
  • Variable swing function
  • Dual microcontroller design
  • Adjustable clock sync input and output
    Includes: 24PPQN (Sync24), 48PPQN, 96PPQN and 4PPQN (one note per pulse)
  • Assembled in the UK


  • Width: 32HP Eurorack module
  • Depth (excluding faceplate): 31.5mm

Stepper Acid Guide

Our handy video guide to using Stepper Acid.

Stepper Acid Demos

Mylar Melodies' wonderful demo using Stepper Acid with a variety of modular gear.

In this video, Nina performs a track with three parts on the modular sequenced with three Stepper Acid modules. The Drum loop and synth strings are via Logic Pro X and synced using external MIDI to DIN sync (Sync 24) converter to the first Stepper Acid in the chain.

Four Stepper Acid modules synced together, showing on the fly pattern creation, transition and chaining.

Stepper Acid is a 16-step Eurorack sequencer module designed with live performance in mind.

Manual Cover

Download the Manual (PDF)

Available from the following retailers:




Schneiders Laden


Perfect Circuit Audio Analogue Haven Three Wave Music

Also available directly from Transistor Sounds Labs in the UK with free worldwide shipping.

Stepper Acid: £295.00

Model: SA-100

Sold out for now.
More stock available soon!

Free worldwide shipping!

Dispatches within 48 Hours.

Approximate shipping time: 1 day within the UK, 3-5 days within the EU and 5-7 days for other destinations.

Shipping via Royal Mail Special Delivery within the UK and Royal Mail International Tracked & Signed for other destinations.