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DUUUUUUUUUURRRM
Drum Machine Alternate Instrument
For QuBit Nebulae v.2 - By Eli Pechman
Durm is a four voice drum machine where all of the voices share the
same parameters as set by the front panel controls.
There are two
ways around this: drum settings are only updated for each voice
when a trigger for that voice is received, meaning that with fast
enough modulation each voice will have settings that differ from
the other voices.
The other possibility is to "lock" the parameters
for the given voice, causing the front panel controls and relevant
modulation to no longer have an effect on that particular drum voice.
This enables the user to tweak the settings for each drum voice to
their liking and then have the option to only modulate the 'unlocked'
voices.
The "speed" knob controls an effect that is shared over all
of the voices with one of four effects being selected by an alternate
control.
All parameters (except for window, pitch and speed) can be
randomized per step with a set randomness amount.
Audio inputs are
routed through the main effect and also through a side chain comp-
ression sort of effect controlled by the internal synthesizer envel-
opes.
Bass drum is always routed to the left channel and all other
drums are routed to the right.
Controls for each voice are as follows.
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Summary of Contents for Qu-Bit Electronix Nebulae
- Page 1 DUUUUUUUUUURRRM Drum Machine Alternate Instrument For QuBit Nebulae v.2 - By Eli Pechman Durm is a four voice drum machine where all of the voices share the same parameters as set by the front panel controls. There are two ways around this: drum settings are only updated for each voice...
- Page 2 Bass Drum Settings Triggered by "Record" Input Pitch Envelope Decay (exponential Pitch Amplitude envelope) Ebvelope Decay Pitch Env. Brightness Modulation Amount Non-linearity Distortion The bassdrum consists of 3 sine wave oscillators that are all ring-modulated and then sent through a low-pass filter. "Nonlinearity"...
- Page 3 Snare Drum Settings Triggered by "Next" Input Pitch Envelope Decay (exponential Pitch AMplitude envelope) Ebvelope Decay Pitch Env. Brightness Modulation Amount Noise feedback White noise mix in The snare drum is a clocked noise source being fed into a filter. The feedback knob sends the output of the noise sample and hold into the clock frequency over the...
- Page 4 High Hat Settings Closed High hat triggered by "Source" Input Open High hat triggered by "Reset" Input Amplitude envelope to pitch modulation Pitch amount. Amplitude Envelope Decay, closed high hat is 1/10th open high hat length Oscillator White noise spread low pass cutoff Wave (sin/ square) White noise...
- Page 5 Percussion Drum Triggered by the "Freeze" input Base Harmonic ratio Pitch numerator Amplitude envelope decay Harmonic ratio Brightness denominator Modulation Waveform The percussion drum is a four operator phase modulation voice with operator frequencies set by an integer numerator/ denominator ratio. The 'blend' knob will increase phase modulation amount from each operator to the next, waveform crossfades between a sine wave and a tangent...
- Page 6 'Next' and 'reset' buttons do not display the freeze state of the drums due to the nature of the nebulae so a few attempts may need to be made to correctly freeze these drums. The alt-pitch knob controls the range of the bass drum to keep it in a lower register than the other drums.
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Page 7: Effects Overview
Effects overview Trigger randomizer random skip random ratchet Compand - distort compress expand/ distort Dj style filter low pass high pass Dj style downsampler downsample high pass sample Dj style Compand/ filter distort Dj style trigger downsampler randomizer All of the drums have one global effect that is controlled by the 'speed' knob.
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