User Manual

Resonance in the classic
MS-20 filter reaches its
maximum output at lower input
volumes, which means — as
you continue to add gain —
you begin to drown out the
resonance. To negate this
effect, Morgasmatron feeds
resonance back into the filter
at an amount determined by
the Q-DRIVE knob, thus
preventing resonance from
being “drowned out” at higher
amplitudes.
If Q is turned down, then
Q-DRIVE will have no effect.
You need to have some
amount of resonance in order
for Q-DRIVE to work.
When a filter’s resonance is
driven into self-oscillation,
increasing the Q-DRIVE
soft-clips the resulting sine
wave, creating a slightly
squared-off waveform with
more harmonic content.
[7] OVERLOAD LED - Monitors
the filter’s output, and begins to illuminate when the signal soft clips.
[8] IN - Sets the drive, or amplification, of the input signal. With a typical 10V p-p eurorack signal,
unity gain is around 12 o’clock. As you turn the knob further clockwise (past 12 o’clock), you
will increase the signal level and induce soft clipping.
Morgasmatron Manual 7