User Manual

THOR POLYSONIC SYNTHESIZER
(RECORD+REASON)
573
Note that “Self Osc” (see below) must be activated for the shaper to operate.
D This filter can self-oscillate and will produce a playable note pitch with high Resonance settings if this is acti-
vated.
Self-oscillation can be switched on or off by using the “SELF OSC” button. The “KBD” knob governs how the fre-
quency tracks the keyboard, turned fully clockwise will produce 12 semitones/octave tracking.
State Variable Filter
This is a multi-mode filter which offers 12 dB/octave slope Lowpass (LP), Bandpass (BP), Highpass (HP), plus
Notch and Peak filter modes which are sweepable between HP/LP states, similar to the vintage Oberheim SEM fil-
ter.
The filter modes are as follows:
D LP 12 (12 dB lowpass)
Lowpass filters let low frequencies through and cut off high frequencies. This filter type has a 12dB/Octave slope.
D BP 12 (12 dB bandpass)
Bandpass filters cut both high and low frequencies, leaving the frequency band in between unaffected. Each slope
in this filter type is 12 dB/Octave.
D HP 12 (12 dB highpass)
Highpass filters let high frequencies pass and cut off low frequencies. This filter type has a 12dB/Octave slope.
D The “Notch” and “Peak” filter modes employ a combination of two outputs from the same filter combining LP
and HP set to the same the filter frequency.
The “LP/HP” knob associated to these two filter modes can modulate the state of the filter from low-pass to high-
pass. If the knob is in the mid-position, you get a Peak or Notch filter slope (depending on the mode). The HP/LP
parameter can be assigned as a modulation destination.
D This filter can self-oscillate and will produce a pitch with high Resonance settings if this is activated.
Self-oscillation can be switched on or off by using the “SELF OSC” button. The “KBD” knob governs how the fre-
quency tracks the keyboard, turned fully clockwise will produce 12 semitones/octave tracking.