tiptop-audio/z2040
Z2040
Enhanced version of the SSM2040 filter chip, 4-pole low-pass VCF with configurable VCA, VC-FM, VC-resonance, and self-oscillation capability as a pure sine-wave VCO.822
Capabilities 3
- Lowpass Filterlowpass-filter
- 4-pole 24dB/oct low-pass filter with SSM2040-based discrete core, VC-resonance, FM input, VC-FM index, configurable VCA, and self-oscillation as sine VCO.822
- Sine-Wave VCO (self-oscillation)vco-sine
- At maximum resonance with no input signal, the filter self-oscillates as a pure sine-wave VCO tracking over approximately 7 octaves with calibration.822
- Vcfvcf
- Voltage-controlled 4-pole resonant lowpass filter.822
Jacks 6 (5 in / 1 out)
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (5) | |||
| FM-IN | cv | -2.5V to 2.5V | 822 |
| IN | audio | — | 822 |
| VC-FM IN | cv | -2.5V to 2.5V | 822 |
| VC-GAIN | cv | ≤5V | 822 |
| VC-RES | cv | -2.5V to 2.5V | 822 |
| Outputs (1) | |||
| OUT | audio | — | 822 |
Parameters 6
| Name | Type | Range | Behavior |
|---|---|---|---|
| FM | knob | — | Attenuates the FM-IN signal before it modulates the cutoff frequency.822 |
| FREQUENCY | knob | — | Sets the cutoff frequency of the 4-pole low-pass filter.822 |
| GAIN | knob | — | Sets the input gain to the filter independently of the VCA position. At MIN–just before 0dB the filter behaves like SSM2040 with low distortion. At 0dB the resonance-gain-compensation circuit kicks in. Past 0dB–MAX, causes non-linear clipping and distortion.822 |
| RESONANCE | knob | — | Sets the resonance offset to the VC-RES input. At maximum, the filter self-oscillates as a pure sine-wave VCO.822 |
| VC-FM | knob | — | Attenuates the VC-FM IN signal, which modulates the magnitude (index) of the FM input via a VCA on the FM line.822 |
| VCA Position | jumper | — | Configures the audio VCA position: disabled (remove top jumper), input VCA, or output VCA. When set to output, no sound passes without a CV on VC-GAIN.822 |
Firmware history 0 versions
No firmware history recorded.
References 2
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[822]
Tiptop Audio Z2040 VC-Filter v.2 Manualmanual⚠ verified 2026-05-23 · manufacturer changed since last verified
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