the 901-A is the oscillator controller for the 901-B oscillators.

Moog Voyager CV Expander

Moog Control Processor

Dual Controlled Pentode Mixer

Tube Based Filter

VCA/Distortion

266r Source of Uncertainty

Through-zero linear FM/PM processor

Multiples

Lag processor

Synthacon VCF

Mankato VCF

Trip LPG

Resynthesis Q110 Q117 Combo

Analog Sample Rate Reducer, Noise Generator, High Pass Filter, Random voltage generator

Modulation Matrix Outputs

Gate Summer Inputs

Voltage Summer Inputs

Input Gate Summers

Input Voltage Summers

Trigger Sequencer Expander

Gate Output Expander

Multiples

Bode Modulator

2 Modules in 1

Gate Sequencer

Mu version of Serge VCS

3 Digitally Controlled Analog Attenuators

VCO

Noise Source / Filters

Attenuators

Fixed Filter Bank

VCF