ajh-synth/gemini-2412-svf
Gemini 2412 SVF
Dual multi-mode VCF featuring two independent vintage SEM-style 12dB state variable filters with a central mixing bus enabling serial, parallel, and inverted parallel modes; includes CV control of resonance, overdrive, and self-oscillation.749
Capabilities 1
- State-Variable Filterstate-variable-filter
- Dual vintage SEM-style 12dB state variable filters with LP, BP, HP, and VARY (LP-to-Notch-to-HP) outputs; can be cascaded for 24dB response.749
Jacks 16 (7 in / 9 out)
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (7) | |||
| 1V/Oct 1 | cv | — | 749 |
| D-FCV | cv | — | 749 |
| FCV 1 | cv | — | 749 |
| FCV 2 | cv | — | 749 |
| IN 1 | audio | — | 749 |
| IN 2 | audio | — | 749 |
| MIX CV | cv | — | 749 |
| Outputs (9) | |||
| BP Out 1 | audio | — | 749 |
| BP Out 2 | audio | — | 749 |
| D-OUT | audio | — | 749 |
| HP Out 1 | audio | — | 749 |
| HP Out 2 | audio | — | 749 |
| LP Out 1 | audio | — | 749 |
| LP Out 2 | audio | — | 749 |
| OUT 1 | audio | — | 749 |
| OUT 2 | audio | — | 749 |
Parameters 15
| Name | Type | Range | Behavior |
|---|---|---|---|
| AUDIO MIX | knob | — | Crossfades the D-OUT output between VCF1 and VCF2 outputs. Can be voltage controlled via the MIX CV input.749 |
| D-FCV Level | knob | — | Controls the amount of D-FCV input (or internal voltage when no cable is patched) sent to both filters. When no external CV is patched, acts as a manual offset for both filter cutoffs.749 |
| D-FCV Mix | knob | — | Controls the balance of D-FCV signal sent to VCF1 vs VCF2. Centre position sends equal amounts to both; fully CCW sends all to VCF1; fully CW sends all to VCF2.749 |
| FCV 1 Level | knob | — | Attenuverter for FCV 1 input. At centre (12 o'clock) no modulation passes; clockwise applies positive modulation to filter cutoff; counter-clockwise applies inverted modulation to filter cutoff.749 |
| FCV 2 Level | knob | — | Attenuverter for FCV 2 input. At centre (12 o'clock) no modulation passes; clockwise applies positive modulation to filter cutoff; counter-clockwise applies inverted modulation to filter cutoff.749 |
| Filter Mode Switch 1 | switch | — | Four-way rotary switch selecting LP, BP, HP, or VARY to route to the OUT 1 jack and central mixing bus.749 |
| Filter Mode Switch 2 | switch | — | Four-way rotary switch selecting LP, BP, HP, or VARY to route to the OUT 2 jack and central mixing bus.749 |
| Freq 1 | knob | — | 749 |
| Freq 2 | knob | — | 749 |
| IN 1 Level | knob | — | Controls VCF 1 input level. Positions up to 8 keep the sound clean; above 8 overdrives the filter core.749 |
| IN 2 Level | knob | — | Controls VCF 2 input level. Positions up to 8 keep the sound clean; above 8 overdrives the filter core.749 |
| INVERT Switch | switch | — | 749 |
| Mode Switch | switch | — | 749 |
| Vary 1 | knob | — | Sweeps the VARY output of VCF1 continuously from Low Pass through Notch to High Pass.749 |
| Vary 2 | knob | — | Sweeps the VARY output of VCF2 continuously from Low Pass through Notch to High Pass.749 |
Firmware history 0 versions
No firmware history recorded.
References 1
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[749]
AJH Synth Gemini 2412 SVF product pageproduct_page● verified 2026-05-22