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Chapter 6 Filter 87
Note: Formant Stretch and Formant Shift are especially useful if the frequency spectrum
of the Synthesis signal does not complement the frequency spectrum of the Analysis
signal. You could create a Synthesis signal in the high frequency range from an Analysis
signal which mainly modulates the sound in a lower frequency range, for example.
Resonance
Resonance is responsible for the basic sonic character of the Vocoder: low settings give
it a soft character, high settings will lead to a more snarling, sharp character. Increasing
the value for Resonance emphasizes the middle frequency of each frequency band.
Note: The use of either, or both, of the Formant Stretch and Formant Shift parameters
can result in the generation of unusual resonant frequencies when high Resonance
settings are used.
Modulation Parameters
The LFO can modulate …
• the frequency (Pitch) of the tracking oscillator (vibrato) or
• the Formant Shift (Shift) parameter of the Synthesis filter bank.
It allows synchronous/non-synchronous modulation in bar, beat (triplet) or free values.
Wave
The Wave switches allow the selection of a waveform type to be used by the LFO. A
selection of Triangle, falling and rising Sawtooth, Square up and down around zero
(bipolar, good for trills), Square up from zero (unipolar, good for changing between two
definable pitches), a random stepped waveform (S&H), and a smoothed random
waveform is available. Simply click on the appropriate button to select a waveform
type.
Intensity
The Intensity sliders control the amount of Formant Shift and Pitch modulation (Vibrato)
by the LFO.