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Sound Parameters – Oscillators

75 Waldorf Q User’s Manual

than Pulse, Alt1 or Alt2 this parameter does not have any effect The following picture illustrates the

effect of the pulsewidth parameter:

Pulse Width 50%

(Square)

Pulse Width 33% Pulse Width 25% Pulse Width <1%

(Impulse)

Picture 16: Pulse Width parameter results

 A pulse width of 50% can be used for flute sounds or very hollow bass sounds.

 A pulse width of around 30% can be used for e-piano or fat bass sounds.

 A pulse width of around 10% is interesting for Clavinet sounds.

 Go experimenting with different startpoints for Alt1- and Alt2-Waveforms to get a general view

on the supply of Waveforms of both Wavetables.

PWM -64…+63

PWM stands for pulsewidth modulation. This parameter determines the amount of modulation that is

applied to the pulsewidth of the oscillator’s square wave. If Alt1 or Alt2 is selected, PWM determines

the amount of the wavetable modulation. If you select any shape other than Pulse, Alt1 or Alt2, this

parameter does not have any effect. The modulation source that affects the pulsewidth is selected by

the source parameter described below.

PWM Source see Table “Fast Modulation Sources” on page 58

Selects the source of the pulsewidth modulation or the wavetable modulation. Common sources for

pulsewidth modulation are envelopes and LFO, but other sources like the modulation wheel or

aftertouch can create nice effects as well.

 To create a thick oscillator sound, use a triangular LFO as PWM Source with full PWM and a

Pulsewidth of around 80. This basic setting is useful for very big string and lead sounds. When

you play different notes on the keyboard, you might notice that bass notes sound more detuned

than higher notes. To avoid this behaviour, set Keytrack of the used LFO to a positive setting

between 50% and 100%.

 To create a Bass sound, use a decaying Envelope as PWM Source with negative PWM and a

Pulsewidth of around 80…127. This results in a fat attack phase, especially when only one

oscillator is used for the Bass.

 When you want to create a sound with a wave sweep, you should roughly set the startpoint

(Pulsewidth) onto the desired wave, before you apply any modulation. This helps you to find

the basic waveform where all modulations start from. Note that you can apply unipolar and

bipolar modulation sources . For example, set Pulsewidth to 64, which is almost the middle of

the wavetable and apply a slow running LFO to PWM Source to sweep through the whole

wavetable.

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Waldorf Q+ Manuel d'utilisateur Page 74