instruo/dapf
dåpf
A dual analogue all-pass filter with cascaded normalisation, offering phase-shifting, psychoacoustic stereo enhancement, and synthetic Doppler effect via two independent channels with 1V/oct tracking.896
Capabilities 2
- All-Pass Filterallpass-filter
- Two cascaded analogue all-pass filter channels with selectable 1-pole or 2-pole response on channel 1 and phase CV control on both channels.896
- Phaserphaser
- Phase-shifting via all-pass filter stages with CV-controllable phase sliders for classic phaser and stereo enhancement effects.896
Jacks 7 (5 in / 2 out)
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (5) | |||
| 1V/Oct Input | cv | — | Bipolar 1V/oct CV input that tracks pitch and is summed with both channels' phase sliders and CV inputs globally.896 |
| CH1 IN | audio | — | Provides direct access to the channel 1 all-pass filter; when no cable is connected, channel 1 audio is normalled from channel 2 input.896 |
| CH1 Phase CV Input | cv | — | Bipolar CV input summed with the phase slider and scaled by the attenuverter to control channel 1 phase.896 |
| CH2 IN | audio | — | Provides direct access to the channel 2 all-pass filter; when no cable is in channel 1 input, this signal normals to both filter channels for mono-to-stereo or serial mono processing.896 |
| CH2 Phase CV Input | cv | — | Bipolar CV input summed with the channel 2 phase slider and scaled by the attenuverter to control channel 2 phase.896 |
| Outputs (2) | |||
| CH1 OUT | audio | — | Outputs the all-pass filtered signal from channel 1; when unplugged, channel 1 signal passes through to channel 2 output.896 |
| CH2 OUT | audio | — | 896 |
Parameters 5
| Name | Type | Range | Behavior |
|---|---|---|---|
| CH1 Phase CV Attenuverter | knob | — | Scales and optionally inverts the CV applied to the channel 1 phase slider, setting the depth and polarity of phase modulation.896 |
| CH1 Phase Slider | fader | — | Shifts the centre frequency of the channel 1 all-pass filter; in 1-pole mode full travel produces 180° phase shift, in 2-pole mode full travel produces 360° phase shift.896 |
| CH1 Pole Toggle | switch | — | Selects 1-pole (left position, -6dB/oct) or 2-pole (right position, -12dB/oct) slope for the channel 1 all-pass filter, which determines whether the maximum phase shift across the full slider travel is 180° or 360°.896 |
| CH2 Phase CV Attenuverter | knob | — | Scales and optionally inverts the CV applied to the channel 2 phase slider, setting the depth and polarity of phase modulation.896 |
| CH2 Phase Slider | fader | — | Shifts the centre frequency of the channel 2 all-pass filter; full slider travel always produces a 360° phase shift of the input signal.896 |
Firmware history 0 versions
No firmware history recorded.
References 2
- [896]
- [897]