Synthesiser voice and signal processor based on a lock-in amplifier
Consists of an input section with signal amplifier and bandpass filter, through-zero quadrature sine oscillator and detector section
Examples of use: complex stereo oscillator, percussion synthesiser, frequency shifter, filter, amplifier, distortion/waveshaper, ring modulator and more
Input amplifier (-20 dB to +30 dB) with level indicator
Bandpass filter with adjustable frequency, bandwidth, resonance, post-filter gain VCA and switchable tracking (internal oscillator)
Quadrature sine wave oscillator with switchable LFO mode, control for rough and fine tuning, exponential FM input with bipolar attenuator, through-zero FM input with bipolar attenuator and adjustable modulation symmetry
Detector section with switchable dome filter, 2 ring modulators with inputs (normalised to input section and internal oscillator), 2 low-pass filters (-12 dB/oct.) with adjustable frequency and 2 selectable frequency ranges
2 Audio inputs and trigger input (ping)
Outputs for amplifier/bandpass filter, oscillator, both low-pass filters, sum and difference of the detector, magnitude and phase
CV inputs for all parameters
Power requirement: 200 mA (+12 V) / 200 mA (-12 V)