LFO - Low Frequency Oscillator
In addition to being able to use VCO2 or VCO3 as modulators, there is a dedicated
analogue LFO.
It has two 2 Sine wave jack socket outputs and two Square wave jack socket
outputs.
SPEED
This control alters the LFO speed / frequency.
CUT-OFF
This sets the amount of Sine wave LFO signal that will modulate the Filter
Frequency Cut-Off (sounds a little like wah-wah!).