make-noise/optomix
Optomix
Two-channel low pass gate using four vactrols for simultaneous voltage control over amplitude and frequency, with DAMP and STRIKE inputs per channel and a summing stage with auxiliary input.862
Capabilities 6
- Audio Mixeraudio-mixer
- SUM OUT provides a mix of both channels plus any signal at AUX IN, allowing chaining with modDemix or other Optomix units.862
- Envelope Generatorenvelope-generator
- Channels can generate percussive envelopes by patching a gate to STRIKE IN; the DAMP parameter sets the decay character without requiring a separate envelope generator.862
- Lowpass Gatelowpass-gate
- Two-channel vactrol-based LPG providing simultaneous amplitude and frequency control per channel via the CONTROL and DAMP inputs.862
- Mixermixer
- Optomix sums its two channels to an always-on internal SUM bus (CH1 + CH2 → SUM output), so it carries the umbrella `mixer` tag. Pinned here because write.py re-inserts only extractor-surfaced capabilities, and `mixer` is not reliably surfaced by extraction — without this override the tag drifts away on every re-ingest. Not a cascading-mixer: the manual states the CH1→CH2 output normal was removed, so there is no chain-break. (#427)862
- Vcfvcf
- Optomix is a low-pass gate (vactrol-based VCFA): each channel combines a voltage-controlled lowpass filter with a VCA. Pinned because the vcf tag extracts non-deterministically and write.py re-inserts only extractor-surfaced capabilities. (#427)862
- Voltage-Controlled Amplifiervca
- Each channel acts as a VCA when driven by a control signal; characterized by moderate attack and slow, ringing decay inherent to vactrol response.862
Jacks 12 (9 in / 3 out)
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (9) | |||
| AUX IN | mixed | ≤10V | Direct-coupled input to the SUM circuit, enabling chaining of multiple Optomix or modDemix units into larger mixes. Accepts audio or control signals up to 10Vpp.862 |
| CH1 CONTROL IN | cv | — | Direct-coupled, highly sensitive CV input driving the Channel 1 vactrol to control the low pass gate.862 |
| CH1 DAMP CV IN | mixed | 0V to 8V | CV input for Channel 1 DAMP parameter; accepts audio or CV. Normalized to +8V when nothing patched.862 |
| CH1 STRIKE IN | gate | ≤8V | Gate input that strikes or plucks the Channel 1 vactrol, triggering the LPG with a fast attack transient. Expects 8V gate signal.862 |
| CH1 Signal IN | mixed | ≤10V | Direct-coupled signal input for channel 1, accepting audio or control signals up to 10Vpp.862 |
| CH2 CONTROL IN | cv | — | Direct-coupled, highly sensitive CV input driving the Channel 2 vactrol for LPG control.862 |
| CH2 DAMP CV IN | mixed | 0V to 8V | CV input for channel 2 damping, normalized to +8V so the DAMP combo pot acts as a manual control when nothing is patched. Accepts audio or CV in the range 0V–8V.862 |
| CH2 STRIKE IN | gate | ≤8V | Gate input that strikes or plucks the Channel 2 vactrol, triggering the LPG. Expects 8V gate signal.862 |
| CH2 Signal IN | mixed | ≤10V | Direct-coupled signal input for channel 2, accepting audio or control signals up to 10Vpp.862 |
| Outputs (3) | |||
| CH1 Signal OUT | mixed | ≤10V | Output of Channel 1 signal as processed by the LPG; up to 10Vpp depending on settings and source material.862 |
| CH2 Signal OUT | mixed | ≤10V | Direct-coupled output of Channel 2 signal as processed by the LPG; up to 10Vpp depending on gate settings and source material.862 |
| SUM OUT | mixed | ≤10V | Sum or mix of all signals processed by the Optomix; also includes any signal at AUX IN.862 |
Parameters 4
| Name | Type | Range | Behavior |
|---|---|---|---|
| CH1 CONTROL Combo Pot | knob | — | Unipolar attenuator for the CONTROL signal input. When nothing is patched to the CONTROL input, acts as a level control for the internal offset.862 |
| CH1 DAMP Combo Pot | knob | — | Acts as a unipolar attenuator for the DAMP CV input. When nothing is patched to the DAMP CV input, functions as a direct manual control for the DAMP parameter.862 |
| CH2 CONTROL Combo Pot | knob | — | Unipolar attenuator for Channel 2 CONTROL signal input. When nothing is patched to the CONTROL input, acts as a level control for the internal offset.862 |
| CH2 DAMP Combo Pot | knob | — | Unipolar attenuator for Channel 2 DAMP CV input. When nothing is patched to the DAMP CV input, functions as a direct manual control for Channel 2's DAMP parameter.862 |
Firmware history 0 versions
No firmware history recorded.
References 2
- [862]
- [863]