A digital replica of the Moog Subharmonicon synthesizer is implemented on the Bela platform. The synthesizer features two voltage controlled oscillators with controllable subharmonics that share a resonant low pass filter. Two step sequencers control the frequency of the oscillators, and the four rhythm generators allow the creation of polyrhythms by generating integer divisions of the main sequencer tempo. Aliasing effects in the digital system are reduced using the differentiated parabolic waveform method, though not eliminated completely. Despite this, the digital subharmonicon has the potential to be a low cost, open source alternative to the expensive Moog original.
Demo Video: https://www.youtube.com/watch?v=J1Kx5j5X2ws&ab_channel=SaraAdkins