NONLINEAR LABS C15 - Page 39

Sound Generation
39
Shaping the feedback sound:
… by using negative feedback level settings:
▶
Press Comb (Feedback Mixer).
▶
Turn the Encoder to [ –40.0 % ].
ߊ At negative settings, the feedback signal is inverted. This will typically
have a “damping” eect and shortens the sound produced. If you are
operating the Comb Filter at negative Decay values, the negative values in
the Feedback Mixer will drive it into self-oscillation.
▶
Press Decay (Comb Filter).
▶
Turn the Encoder to [ –1260.0 ms ].
… by applying the signal-shaping parameters of the Feedback Mixer:
▶
Press Drive (Feedback Mixer).
▶
Sweep the Encoder across the entire range.
▶
Press Drive (Feedback Mixer) again to access the parameters Fold and
Asymmetry.
▶
Again sweep the Encoder across the entire range.
ߊ As with the Output Mixer, the Feedback Mixer has a shaper stage that can
distort the signal. The saturation of this stage limits the feedback level to
avoid uncontrolled nastiness. Shaper curves allow a certain sonic control
over the self-oscillating signal. Try out the eects of “Drive”, “Fold”, and
“Asymmetry” and listen closely to the sonic results. Feedback level and
polarity as well as the Drive parameters interact with each other.
… by modifying the Envelope / Oscillator A settings (exciter):
Still, the entire audible sound is generated by the comb filter only. Oscillator A is
producing nothing but a short exciter signal which influences the resulting wave-
forms at the output of the Comb Filter – but is not audible itself. A lot of timbral
variations can be achieved by adjusting the parameters of Oscillator A and its
Envelope A.
▶
Reset the Parameters of Drive (Feedback Mixer) by using the Default button
▶
Press Pitch (Oscillator A).
▶
Sweep the Encoder across its entire range while playing notes and dial in [
72.00 st ].
▶
Press Sustain (Envelope A).