Making room in my rack for different modules. The MUM M8 is fantastic, but I have too many filters and need to pare down.
Slight rack rash on lower mount point.
‘MUM M8’ is an 8HP Eurorack low pass filter building on the filter
design used in the classic Akai S950 12 bit sampler with the addition of
resonance, voltage control, clipped saturation and a dedicated VCA.
The
low pass filter gives the recognisable super smooth vacuum like tone
sucking sound which works magic on complex sources. The addition of
clipped overdrive and intentionally aggressive self oscillating
resonance compliment the smooth filter core by juxtaposing it into more
wasp like territory with acidic squeals and a more gritty sound.
Mum
M8 features dual voltage control with attenuation (and inversion) of
filter cut off and voltage control of resonance together with dual audio
inputs - one of which includes a VCA to with the capability to aid
overdriving signals into the filter core.
The filter core is a
6th Order Butterworth switched capacitor type design featuring an analog
core but controlled by a high speed digital clock. This produces the
characteristic smooth sounding filter but, as with the original S950,
has a relatively high minimum cut off as to avoid ‘clock bleed’ into the
filter output from the digital control. This minimum cut of point (and
introduction of bleed if required) can be controlled via trimmers on the
rear of the module (see calibration chapter). It is not unusual for
there still to be some low level artefacts from the clock present,
particularly during filter sweeps - these add to the filters character.
The
motivation for the module came from discussing filters in classic
samplers with the artist Jack Adams - aka Mumdance. Jack suggested
investigating the S950’s filter well known as for it use in classic use
in early jungle and hardcore. From that point onward Jack provided
inspiration, help and feedback in the development of the filter. Big up
Mumdance.