09.feb.2016!Mutant Snare user manual v1.03 PG3
Hexinverter Électronique, 2016
INTERFACE
Shell Interface
SHELL TONE
Blends the mix between the two sine wave oscillators that make up the SHELL
sound. Turning the knob all the way to the right results in only the secondary
fixed frequency sine wave in the mix (tuned to the same frequency the higher-
pitched model of the 808 had). All the way to the left results in only the primary
pitch-adjustable sine wave making it into the SHELL mix.
SHELL PITCH
Adjusts the pitch of the primary sine wave oscillatorin the SHELL tone. This
control has an adjustment range of about two octaves, and spans from low
tom/bassdrum sounds up to high-pitched snare tones.
Snappy Interface
DECAY
This control, along with the respective CV input jack and attenuverter, allow you
to adjust and modulate the decay of the SNAPPY envelope. This control is
adjustable all the way from short decays about 10x faster than the drum machine
this circuit was inspired by, up to about 10 seconds. Note that the CV input
features an attenuverter - which means the zero CV position is at the knobs
centre. Turning the knob to the left of centre inverts your CV signal coming in,
while turning it to the right will apply your CV signal in a positive way.
This switch selects the mode of the 12dB/oct filter the SNAPPY sound passes through. The filter can be either high-
pass (HP) or band-pass (BP).
This switch selects the resonance of the SNAPPY filter. At CENTRE position, it is the same mild resonance found in the
808 snare drum's filter section. Turning the resonance switch UP causes self-oscillation of the filter to occur. Turning
the switch DOWN selects medium resonance, which is higher than the CENTRE position, but not enough resonance for
self-oscillation to occur.
The cutoff frequency of the filter can be adjusted/modulated with this control, its respective CV input jack and
attenuverter. When no jack is plugged into the CV input jack for CUTOFF, either the SNAPPY decay envelope or primary
sinewave oscillator of the SHELL normalize into the CUTOFF CV and attenuverter. Use the jumper on the back of the
module in order to select which of these two internal modulation sources normalise to the CUTOFF CV input jack. If you
wish to disable this internal modulation feature, simply leave the jumper disconnected from either of the selections.
The EXT IN jack allows you to replace the internal white noise generator with an external audio signal. While the Mutant
Snare circuit is tuned for modular-level signals, you can also experiment with line level signals. The SNAPPY level
control adjusts the volume of the signal feeding into the SNAPPY circuit - be it your external source or the internal
noise generator of the Mutant Snare.
Adjusts the final output volume of the combined SNAPPY and SHELL tones. Begins to overdrive at around 50%.
Overdrive/clipping is indicated by the purple LED above the OUT jack.
