1984 Mode ROM-accurate D7811G envelope, VCF frequency from firmware disassembly, 4-position switched HPF. All parameters calibrated from firmware analysis and factory schematics. 1982 Mode Analog RC envelopes, continuous HPF sweep calibrated from 11 hardware measurements, LFO rate from circuit model. Analog CV path modeled from circuit analysis and real hardware. 6/8/10 Voice Poly Per-voice DCO, V