Frequency - 0 => $2000, default $100. Non-linear cutoff frequency of filter.
Resonance - 1 / Q, 0 => $6000, default $1000 = filter will ring at low values.
LFORate - 0 => $0100, default $0020, rate of sawtooth modulating filter
LFODepth - 0 => $2000, default $0100, Amplitude of sawtooth modulating filter. Actual cutoff is = Frequency + SawtoothOutput*LFODepth.
Sawtooth - 0 => $0400, default = $0100 = frequency of primary sawtooth.
SawAmplitude - 0 => $7FFF, default = $7FFF = amplitude of primary sawtooth.
N memory = 35 words