CS-80 style ring modulation. So why not use the Model 77 ring modulator module? Well that’s becuase I’ve put in an extra feature. As well as the standard Attack, Decay, Depth, Speed and Modulation depth, I’ve added triangle, saw, and square wave LFO modulation as well as sine wave. And they can be mixed togther to produce other modulation waveforms.

A guide to the ring modulation controls.

ATTACK- Sets the initial length of speed increase from the current SPEED setting.
DECAY – Sets the time for speed to fall from max at the end of the attack phase to the current SPEED setting.
DEPTH- Sets the maximum amount of attack/decay envelope speed increase.
SPEED- Sets the basic (base rate) ring mod speed.
MOD (Modulation) – Sets the basic ring mod depth.
TRI – triangle wave modulation mix level.
SIN – sine wave modulation mix level.
SQR – square wave modulation mix level.
SAW – sawtooth wave modulation mix level.

To remove the attack/decay phase set the depth to zero for a constant ring modulation level (as set by the MOD slider). To have no ring modulation at all move the MOD slider to zero.

The ring modulation has been embedded into a standard single oscillator synth patch (VCO with waveform mix into the ring modulator, VCA, key velocity VCA, VCF and reverb, with ADSR shared for the VCA and VCF). The synth has glide, a PWM LFO, mod wheel vibrato and is velocity sensitive. Note the the VCA/ADSR functionality is actually carried out by the second A114 ring modulator rather than an actual VCA!

The ring modulator consists of an ADSR, Dual Gain (to tone down the evelope level), VCA, and VCLFO with the VCLFO waveforms going to a CV mixer, and then to the ring modulator.