Syntheogen Guide

Reduction effect

Updated May 29, 2014

Reduction is a type of distortion that works by reducing the sample rate or the bit depth of the incoming signal. The sound of this effect is hard to predict, and varies greatly with the source material. Reducing the sample rate lowers the Nyquist frequency, causing various inharmonic tones to appear in the output; at very low levels, the sound becomes harsh and unstable. Reducing the bit depth can produce crunchy or rubbery sounds, or sometimes just add noise. Low bit depths produce grating sounds that can be very sensitive to small level variations.

After setting the effect type to Reduction, you will see the following controls:

TRACK EFFECTS dialog with reduction

TRACK EFFECTS dialog with Reduction effect

RATE Sets the sample rate as a percentage of the Syntheogen default, 44.1KHz.
HOLD

When RATE is less than 100, gaps appear between samples; these can be filled by holding the sample values, or by inserting zeroes.

HOLD determines the length within each gap that is filled by holding, after which zeroes are inserted. Low HOLD values produce high-frequency distortion and often attenuate low frequencies as well. HOLD has no effect when RATE is 100.
DEPTH

Sets the bit depth, in bits. Though Synthegeon outputs CD-quality sound with 16 bits of depth, it mixes signals internally with 32-bit floats that have 24 bits of precision; for this reason, DEPTH varies from one to 24.

Because of the extra precision in Syntheogen's internal format, higher DEPTH values have little discernable effect on the output. At sufficiently low levels, aliasing can produce pops and crackling sounds in even moderately dynamic signals.
MIX Sets the effect mix, in percent. At 100, the output contains only the processed sound; at zero, it contains only the original signal.

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