Propellerhead Reason - 4.0 Betriebshandbuch PDF herunterladen (Seite 209)

THOR POLYSONIC SYNTHESIZER

207

D The Arrow button in the top left corner of each slot opens a pop-up menu

where an oscillator type can be selected for the corresponding slot.

There are six Oscillator types available:

• Analog

• Wavetable

• Phase Modulation

• FM Pair

• Multi Oscillator

• Noise

You can also select Off mode (no oscillator).

Common parameters

The specific parameters of the various oscillator types are described separately, but

there are also common parameters that apply to all oscillator types. These are:

D Octave (OCT) knob - this changes the pitch of the oscillator in octave

steps.

The range is seven octaves.

D The Semi knob changes the pitch of the oscillator in semi-tone steps.

The range is 12 semitone steps (1 octave).

D The Tune knob fine tunes the pitch of the oscillator in cent steps.

The range is +/- 50 cents (down or up half a semitone).

D Keyboard Track (KBD) - this knob sets how much the oscillator pitch

tracks incoming note data.

Turned fully clockwise the pitch tracks the keyboard normally, i.e. a semitone per

key.

D All oscillators also have waveform selectors and a modifier parameter.

How the waveform selection works, and what parameter is the modifier

varies according to the selected oscillator type.

D Important to note is that if you have made a modulation routing to an os-

cillator parameter e.g. the modifier, and then change the oscillator type,

the modulation will be transferred to the corresponding parameter in the

new oscillator.

The same goes for all common parameters (tuning and tracking). If you switch os-

cillator type, all common parameters are left unchanged.

D Oscillators can be synced - see “About Oscillator Sync”.

D Any oscillator type loaded into the Oscillator 1 slot can also be amplitude

modulated by Oscillator 2 - see “About Amplitude Modulation (AM)”.

Analog oscillator

This is a classic analog oscillator with 4 standard waveforms. The waveform selector

button is in the lower left corner of the oscillator panel, but you can also click directly

on the waveform symbols to switch waveform. The four available waveforms are from

the top down (as displayed on the panel): Sawtooth, Pulse, Triangle and Sine.

D The Mod parameter (PW) controls pulse width and only affects the pulse

waveform.

By modulating the PW parameter the width of the pulse wave changes, allowing

for PWM (Pulse Width Modulation) which is a standard feature in most vintage an-

alog synths.

✪ For a perfect square wave, set pulse width (PW) to 64.

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 timbre 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.

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