User Manual

THOR POLYSONIC SYNTHESIZER
(RECORD+REASON)
566
Wavetable oscillator
Wavetable oscillators has been the basis of several vintage synths (PPG, Korg Wavestation and many others).
• With the Wavetable oscillator, you select between 32 wavetables, where each wavetable contains several (up
to 64) different waveforms. By using an envelope or a LFO you can sweep through a wavetable to produce tim-
bre variations.
The parameters are as follows:
D Position is the modifier (Mod) parameter and controls the position within the selected wavetable, i.e. which
waveform is active at a given time.
By modulating the Position you can sweep through the waveforms in the selected wavetable. You can of course
also use a single static waveform in a wavetable if you so wish, by not applying any modulation to this parameter.
D The X-Fade button determines whether the change between waveforms in a wavetable should be abrupt (X-
Fade off), or smooth (X-Fade on).
If set to on, the waveform transitions are cross-faded.
D There are 32 wavetables that can be selected using the up/down buttons or by clicking in the Wavetable dis-
play.
Some of the wavetables have waveforms that sequentially follow the harmonic series, i.e. each following waveform
adds a harmonic. Others have waveform series that produce a sound similar to oscillator sync when swept, and other
wavetables are simply mixed waveforms. The last 11 wavetables are based on wavetables used in the original PPG
2.3 synthesizer.
Phase Modulation oscillator
The Phase Modulation oscillator is inspired by the Casio CZ series of synthesizers. Phase modulation is based on
modulating the phase of digital waveforms to emulate common filter characteristics.
D You have a First and Second waveform which can be combined. Instead of mixing the two waveforms they are
played in series, one after the other.
This adds a fundamental one octave below the pitch of the original sound.
D The PD parameter (Mod) changes the shape of the wave, much like a filter does.
The following waveforms (sequentially from the first) are available as the First waveform:
•Sawtooth
•Square