Future Retro 777 Modifications - Manual (Page 6)

Sub oscillator waveform
The waveform each sub oscillator produces is a square wave. By selecting a sawtooth
waveform in an oscillator (oscillator A), with its level at max, you can then turn up its
related sub oscillator level (sub- oscillator A) and the result waveform is a sawtooth 1
octave below the frequency of oscillator A. The same applies to oscillator B.
You can look at this in two ways.
1. When sub oscillator A’s level is up, by bringing up oscillator A’s level with
sawtooth as its waveform you are changing sub oscillator A’s waveform from
square to sawtooth.
2. The reverse of this is when oscillator A is set to sawtooth and its level is up, by
bringing up sub oscillator A’s level you transpose the sawtooth 1 octave down in
pitch