User Manual

THOR POLYSONIC SYNTHESIZER
(RECORD+REASON)
574
Comb filter
The Comb filter can add subtle pitch variations and phasing-like effects to sounds.
D Comb filters are basically very short delays with adjustable feedback (controlled with the Resonance knob).
A comb filter causes resonating peaks at certain frequencies. Comb filters are used in various signal processing
devices like flangers, and produces a characteristic swooshing sound when the frequency is swept.
D The difference between the “Comb +” and “Comb –” modes is the position of the peaks in the spectrum.
The main audible difference is that negative Comb mode causes a bass cut.
D The Resonance parameter in both cases controls the shape and size of the peaks.
This filter will produce a pitch with high Resonance settings combined with low frequency settings.
Formant filter
The Formant filter type can produce vowel sounds. There are no Frequency or Resonance parameters, instead you
have a horizontal “X” parameter slider and a vertical “Y” parameter slider that operate together to produce the various
filter formant characteristics.
D You can alter the settings of both the “X” and “Y”parameters simultaneously by moving the “dot” inside the
gray rectangle on the filter panel.
Horizontal movement changes the “X” parameter, and vertical movement the “Y” parameter.
D The ENV-VEL-KBD knobs affect the “X” parameter.
The parameter can be CV controlled.