I just updated the Beat707 Mikro files, including HEX files for the ATmega328 ICs, some Docs and better folder names for the sources.


Also, if you could support me on Patreon, I will them continue to release more Open Source Arduino compatible stuff. ;-) I have hopes of creating a simple sample-player synth with wavesequencing. Maybe using the Arduino DUE or even going into a Bare-Metal Raspberry PI mode.


Cheers, WilliamK

Beat707 Mikro

Open Source Arduino Compatible MIDI Sequencer / Groove Box

  • 16 x 2 Steps (Double Steps) and 4 Pattern Variations (ABCD) for a total of 128 Steps per pattern on both Drum and Note Tracks, 99 patterns total.
  • 14 Drum Tracks, 2 Accent Tracks.
  • 09 Note/CC Tracks - Note# and Velocity per Step or MIDI CC (Controller) Type and Value.
  • Each step on both modes have: Off, Regular Note On, Double Note, Double Note In. On Note Tracks you also have Slide and Note Off.
  • MIDI Processor Per Track. EG: Fade In, Fade Out, Chords. Including a special Custom Chord creator, which allows you to create 12 different 5 key chords. Those will not follow the played key, but only the played octave. So you can add multiple C, D or whatever you want to different keys in an octave and have those play according to the played octave.
  • 99 Slots Song, with Pattern# and Repeat# per Slot.
  • 99 Songs Space with Song Name support.
  • Pattern and Song Modes.
  • Mirror mode for editing all the 4 Pattern Variations at once.
  • SD Card Support (required, as it stores program related data).
  • The hardware uses two Arduino ATmega328 compatible chips for parallel processing. One takes care of the SD Card and Interface while the other only Sequencing.
  • All SD Data is stored in .txt readable format.
  • LCD 16x2 Interface.


About the Beat707 Mikro PCB: the only thing missing are the interface buttons which you will need to provide and attach to the PCB Main Headers.See the video on our front-page for details. The Headers has all the 11 buttons pins and ground pin ready for connection directly to any push button you may want to use. No keyboard matrix used, no extra components required as we use internal pull-up resistors for each button.


We are running a PreOrder for this product, which should be out the door pretty soon. We will inform on our Facebook page on how things are going. 

The Beat707 Vox PCB will be based on the Beat707 Mikro PCB, but without the SD Card and extra MC (ATmega328). It will have 4 jumpers to select the MIDI Channel, another 3 jumpers to select I2C ID (so you can have more than one unit been programed by a Main Beat707 Mikro Unit). Headers for the Analog Pot (for the realtime Pitch-Changes) and a Reverse Button.

For more details about the software and hardware, visit the official product files on https://github.com/Beat707/Beat707-Mikro/



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