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Resources

This page lists reference material for building Eurorack modules. It complements the builds directory with places to find designs it does not cover, archives of circuits older than any repo, and a simulator for working out what a circuit does.

Finding designs

These directories link to many more open designs than this directory lists.

  • List of synth DIY repositories (sdiy.info)

    This community-maintained index lists over a hundred GitHub accounts that publish synth designs. If a maker is missing from this directory, start here.

  • Online resources (sdiy.info)

    This page collects links across synth DIY more broadly, including forums, courses, parts sources, book scans and long-running project sites.

Circuits and schematics

These archives hold the circuits themselves, including designs that predate GitHub.

  • electro-music schematics vault

    This archive of synth schematics has been collected over decades, and it covers classic and obscure circuits that are not in any repository.

  • Mutable Instruments source

    This repository holds the hardware and firmware for every Mutable Instruments module. The designs have been widely cloned and adapted, so many DIY builds derive from them. The code is MIT licensed and the hardware CC BY-SA 3.0.

Content for the build

A sample player or a wavetable oscillator needs files to play, and each device expects them in its own layout. I make both of these tools.

  • SampleStack

    SampleStack sorts, edits and converts sample libraries for the device that will play them. It applies to the WAV trigger and sample player builds here, which each need their files named and formatted in a particular way.

  • WaveStack

    WaveStack builds wavetables and writes them out in the layout a device expects. It only applies to builds that read their tables from storage, such as Kishoof with its USB-accessible flash. An Electric Druid VCDO keeps its tables in firmware.

Tools

A simulator helps you understand a circuit before you order parts for it.

  • Falstad circuit simulator

    This simulator runs in the browser and animates current as it flows, which helps you see how a filter or oscillator stage behaves before you commit to a build.

Know something that belongs here? Send it over.