Post-Synthesis: Adventures in using FPGAs for commercial Eurorack modules

Eric S

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In 2022 Schlappi Engineering released Three Body, a Eurorack phase and frequency modulation triple oscillator based on the Lattice ECP5 FPGA and the open source Yosys/Nextpnr toolchain.

This talk will recap the development of that oscillator from iCEBreaker FPGA and ULX3S development boards, through release and manufacturing, and then discuss the various pitfalls and discoveries we have made in prototyping since then.

Eric Schlappi is an a hardware engineer and musician who has been designing and manufacturing Eurorack synthesizer modules full time since 2018.