Developer Cyrille Henry let us know about a new Arduino-based monophonic synthesizer, the One Chip Synth (OSC-2).
The OCS-2 is a complete virtual analog synth voice in Eurorack format.
Here are a couple of video demos:
Additional audio demos are also available.
- 2 VCO providing 15 different waveform
- 1 VCF (multi-mode, including a 24db/Octave low pass resonant filter)
- 1 VCA
- 1 ADSR
- 3 LFO (2 with configurable waveform, 1 with CV frequency control)
- 1 custom CV GENERATOR with 4 different algorithms (Attack Release, dual LFO, Random, Non Linear)
- 1 audio effects processor with 4 different effect (Distortion, delay, bitcrush, waveshaper)
- 1 ring modulator
- 1 CV controlled MIX (for VCO1 and VCO2)
- 2 octaves keyboard with portamento
- 1 digital matrix to connect CV to modulation fader
- 1 Stereo line-IN with envelope follower and gate control
- 1 MIDI input (note / velocity / pitch wheel / modulation wheel / control change)
- 3 analog CV IN and 1 GATE IN
- 1 light sensor
- 30 fader, 12 bits input
- 48KHz audio synthesis
- about 10KHz for CV computation
- 24 bits audio ADC and DAC
- 32 bits audio synthesis
- 82 dB S/N ratio for the audio line-out (measured)
- 0.15 ms IN/OUT audio latency
- cortex M3 32 bits micro-controller (arduino due)
- 7 to 12V power supply (1 standard 2mm power plug or 1 standard eurorack plug)
- low power consumption (300mA @ 12V)
- 3U, 10 inches (50HP) eurorack format
- 254 x 128.5 x 50 mm (290 x 139 x 55mm for the box)
- about 270g (750g with the wood box)
Additional details are available from Henry via his site.