Waveshaper - OTO Biscuit User Manual

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3.1 WAVESHAPER

A waveshaper is a device that modifies the signal waveform using digital
processing. BISCUIT offers you 8 types of waveshaping. These treatments
can create distortions (type 1 to 5) very different from Biscuiting (cf chap
2), or even generate a synthesizer waveform (type 6 to 8).
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Only the « - / F1 » and « + / F2 » switches are used in this effect. They al-
low you to select one of the 8 types of waveshaping. The switch lit up white
indicates the current selection. 09
The CLOCK pot acts as usual (changing the sampling frequency), except
for the last 3 waveshapers (oscillators) where CLOCK sets the filter attack.
10 1 2
5 6
WAVESHAPER TYPES 10
1/ Rectifying : The negative parts of the signal are inverted and become
positive. This waveshaper creates an octave up effect, similar to a fuzz
octave pedal.
2/ Alternate rectifying : Only the positive parts of the signal are used,
and one of two are taken off. This waveshaper creates a distorted octave
down effect.
3/ Bat Fuzz : Beyond a certain threshold, sound is inverted, as in a mir-
ror.
4/ Biscuit : This create a fifth down effect with some crunchy saturation
added.
5/ Swap : The 1 to 4 bits are swapped with the 5 to 8 bits. This distortion
is pretty radical and full of high harmonics. It may be close to white noise
depending on the signal level. Try to lower the DRIVE pot to get different
sound colours.
3 4
7 8
The 6, 7 and 8 waveshapers are little synthesizers. They generate a wave-
form that tracks input signal frequency. These 3 waveshapers work best on
bass synth sounds but can lead to stunning results on other sources.
The DRIVE pot works at the same time on the sensitivity of the filter attack
and on the detection of input signal to generate the waveform. To allow the
oscillator to work properly, BISCUIT needs a certain amount of input signal.
Thus the BYPASS switch should often light up orange. Adjust the DRIVE pot
to obtain a stable sound and a well-defined attack.
The CLOCK pot sets the level of the filter attack.
When the incoming signal attacks are not detached (legato), the filter at-
tack will not be triggered. Play staccato or play on a keyboard (connected
to MIDI in) to trigger attacks. Check that the NOTE ON function in the MIDI
menu is on.(cf Chap5)
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