Shruthi-1: build it!

This section contains all the information allowing you to build your own Shruthi-1 or hack its firmware.

Soooo what’s the deal?

The Shruthi-1 comprises a digital section (aka controller board), hosting the display, main microcontroller, switches and pots ; and an analog (aka “audio” or “filter” board) hosting the VCF, VCA, input mixer and the output stage. Several variants of the analog boards are available to provide a broad range of sounds.

Controller board

Analog board

In preparation:

  • Simple MS-20 clone + PT2399 delay

Enclosure

Here are some files to help you design your own case:

  • Export of the Shruthi-1 control board silkscreen, with parts footprints. To be mirrored!
  • Blueprint with 3D parts placement by nio101
  • A Sketchup export of nio101’s 3D model
  • SVG file for the acrylic case.
  • Image of the Paisley pattern engraved by default on the cases.

Licensing information

Schematics and PCBs of the digital and SMR4 board are released under a Creative Commons cc-by-nc-sa license. Schematics and PCBs of the other filter boards ; and documentation/analyses are released under a Creative Commons cc-by-sa license. Firmware code is released under a GPL3.0 License.