AD-202 is a single-oscillator monosynth in the small-grey-box tradition of the early 1980s. One VCO with saw, pulse, sub, and noise running into a 24 dB ladder filter, one envelope, one LFO, and very little else. All main controls are on the front panel, and there is exactly one path from a knob to a sound.
Under the vintage panel it is a thoroughly modern instrument. Mono or eight-voice poly, per-voice analog drift, a tempo-syncable LFO with a delayed onset, MPE, MTS-ESP microtuning, and a post-VCA color section with pre-filter saturation, filter drive, distortion, and a tilt EQ. The vintage part is the ergonomics. The rest of it is not vintage at all.
Features
Single VCO with four footages
Sub oscillator
Source mixer with pre-filter saturation
24 dB ladder filter
One ADSR, shared
LFO with delayed onset
Three trigger modes
Portamento
Mono or eight-voice poly
Age (Per-voice fixed random drift across pitch, pulse width, cutoff, LFO rate, and mixer levels)
Output stage (Post-VCA distortion and a bipolar tilt EQ pivoting at 1 kHz)
MPE and aftertouch routing
MTS-ESP microtuning
Independent velocity amounts to the amplifier and to the filter
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