instruo/ochd-expander
øchd expander
Capabilities 3
- Expanderexpander
- Expands the Instruō øchd via a dedicated ribbon cable connection to the øchd's 2x4 expander pin headers.890
- Logiclogic
- Implements analog diode OR (maximum) and AND (minimum) logic on two LFO pairs, outputting bipolar signals.890
- Modulation Sourcemodulation-source
- Provides 16 additional modulation outputs derived from øchd's LFOs: full-wave rectified unipolar LFOs, diode-logic min/max pairs, cascading trigger signals, and R-2R random voltages — totaling 24 modulation sources when combined with øchd.890
Jacks 16
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Outputs (16) | |||
| LFO 1 Full Wave Rectifier | cv | 0V to 5V | Outputs a full-wave rectified unipolar positive triangle waveform derived from LFO 1, at twice the frequency of the original bipolar LFO.890 |
| LFO 2 AND LFO 3 AND | cv | -5V to 5V | Outputs the minimum (AND/diode logic) of LFO 2 and LFO 3 as a bipolar signal.890 |
| LFO 2 AND LFO 3 OR | cv | -5V to 5V | Outputs the maximum (OR/diode logic) of LFO 2 and LFO 3 as a bipolar signal.890 |
| LFO 2 Trigger | trigger | — | Outputs ~8ms trigger signals at the start of LFO 2's rising edge. When unpatched, its signal cascades to the next output.890 |
| LFO 3 Full Wave Rectifier | cv | 0V to 5V | Outputs a full-wave rectified unipolar positive triangle waveform derived from LFO 3, at twice the frequency of the original bipolar LFO.890 |
| LFO 4 Trigger | trigger | — | Can output triggers from LFO 2 and LFO 4 depending on whether the LFO 2 Trigger output is patched; enables cascading stochastic trigger patterns.890 |
| LFO 5 Full Wave Rectifier | cv | 0V to 5V | Outputs a full-wave rectified unipolar positive triangle waveform derived from LFO 5, at twice the frequency of the original bipolar LFO.890 |
| LFO 6 AND LFO 7 AND | cv | -5V to 5V | Outputs the minimum (AND/diode logic) of LFO 6 and LFO 7 as a bipolar signal.890 |
| LFO 6 AND LFO 7 OR | cv | -5V to 5V | Outputs the maximum (OR/diode logic) of LFO 6 and LFO 7 as a bipolar signal.890 |
| LFO 6 Trigger | trigger | — | Can output triggers from LFO 2, LFO 4, and LFO 6 depending on whether preceding trigger outputs are patched; part of cascading stochastic trigger pattern.890 |
| LFO 7 Full Wave Rectifier | cv | 0V to 5V | Outputs a full-wave rectified unipolar positive triangle waveform derived from LFO 7, at twice the frequency of the original bipolar LFO.890 |
| LFO 8 Trigger | trigger | — | Can output triggers from all four even LFOs (2, 4, 6, 8) depending on whether all preceding trigger outputs are patched; the final stage of the cascading trigger chain.890 |
| R2R Even LFOs DAC | cv | — | Outputs a 4-bit R-2R DAC random stepped voltage using all even-numbered LFOs (2,4,6,8), with LFO 2 as MSB and LFO 8 as LSB.890 |
| R2R LFOs 1-4 DAC | cv | — | Outputs a 4-bit R-2R DAC random stepped voltage derived from LFOs 1–4, with LFO 1 as MSB and LFO 4 as LSB.890 |
| R2R LFOs 5-8 DAC | cv | — | Outputs a 4-bit R-2R DAC random stepped voltage derived from LFOs 5–8, with LFO 5 as MSB and LFO 8 as LSB.890 |
| R2R Odd LFOs DAC | cv | — | Outputs a 4-bit R-2R DAC random stepped voltage using all odd-numbered LFOs (1,3,5,7), with LFO 1 as MSB and LFO 7 as LSB.890 |
Parameters 0
No parameters recorded.
Firmware history 0 versions
No firmware history recorded.
References 2
- [890]
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[891]
Instruō øchd expander product pageproduct_page● verified 2026-05-24