An input into part of the synthesizer that allows that bit to be modulated by another part of the synth. For example there is a control input in the amplifier which controls the level of amplification. If a very slow sine wave (an LFO) is patched into this input then the sound will slowly get louder and quieter. If an LFO was patched into the control input of the oscillator instead, then the sound would go higher and lower in pitch....
CS15
The cs15 is a beaut of a little (3 octave keyboard) monosynth and is set up in 2 parallel audio
paths. The are 1 lfo (sine, ramp down, non-triggerable s/h), 2 VCOs, 2 VCFs, 2 egs (adsrs) and
2 VCAs. The first audio path starts with VCO1 (triangle, ramp down, and square, 64'-2', lfo mod,
pw% 50-90, and pwm) and goes through a mixer module which is mixed with a noise source,
either internal (white) or external. It is then ran through the VCF which can either be a LP, BP,
or HP. It is a resonant filter, but does not go into sharp self oscillation. The filter can be
modulated by the LFO or a EG (eg1+, EG1-, EG2+) and these modulation amounts are
controllable. From the filter it goes in the AMP which