User Manual: Octave Cat page
Reset Proceedures: N/A
Operating System code: N/A
MIDI or other control protocol: N/A
Software related Links: N/A
Patches or knob settings: I've taken digital photos, but Octave cat page has a template.
Circuit Overview: below
Scematics/Service Manual: fdiskc archive or Octave Cat page SRM+ or Synthfool's SRM1
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: SSM2040 VCF in plain "The Cat" and earlier SRM rev A, SSM2044 VCF in rev. B and that + CEM3340 VCO's in SRM-II. CA3046 transistor arrays used in VCO also as I recall on early ones.
Modifications:Octave cat page
General Info Links: Vintage Synth or Octave Cat page THanks John!
Circuit Overview:
Classic analog with cross modulation and flexible routings. And...a non-linear taper pot that goes 1 full step the first half of the movement up or down and the rest of the octave in the next half! Reeeow! Very discrete circuitry for '77 Due probably to legalities with ARP some of the duophonic circuitry got re-baked I think in the later versions.
Service Tips:
Tuning tips for Sound Doctorin'