MATRIXSYNTH: Crumar BIT DCO clone with added functionality


Sunday, June 23, 2024

Crumar BIT DCO clone with added functionality


video upload by Craig Barnes

"This dual DCO is based on the counter/resistor ladder technique used in the Crumar Bit series of polyphonic synthesizers, the 8253c triple counter has been replaced by a Waveshare Zero RP2040 based SOC. This allows the Waveshare to receive MIDI and calculate portamento etc. The only thing I want to add is an interval for DCO2 to set things like 5ths up in the DCO pair. Each DCO currently has 4 waveforms, Saw, PWM, Triangle and SUB. Although I might reduce that down by removing a triangle and SUB from either side. It was designed as a DCO core for a monosynth or a poly depending on needs."

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