The MIDIbox SEQ v4 is a very affordable[1] DIY pattern-based sequencer, designed by Thorsten Klose. It has 16 simultaneous tracks which can be edited live. It runs on the Discovery STM32F4 processor. Typically built with four MIDI outs and up to four MIDI ins. A CV/gate/Trigger breakout gives eight CV/gate pairs and up to 64 triggers..[2]

Building guides

The MIDIbox site ( has information on how to build the Core and Midi I/O modules. Useful MIDIbox forum posts include Building a MIDIbox SEQ V4 (Wilba Control Surface) – Photo Tutorial, Wilba's MB-SEQ Construction Guide and Lasercut Acrylic Case+ Frontpanel for SEQv4.[1]

Required parts

At least the SEQ CS PCB and parts kit, a Core STM32F4 Discovery breakout PCB and parts kit, one or two MIDI I/O PCB and parts kit.[1]


  1. ^ a b c Just completed a Midibox SEQ v4 sequencer!, Reddit, 23 December 2015
  2. ^ MIDIBox Sequencer V4 – a review, Mod Wiggler forum, 30 April 2015

External links