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SOUNDSHAPER: CDP REFERENCE

CHORUS - randomly vary amplitudes and/or frequencies 


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SPECTRAL > FREQ/PITCH > CHORUS >

SUMMARY
Randomise amplitudes and/or frequencies of partials. CHORUS can create a chorus effect by randomly varying frequencies and/or amplitudes, but value ranges for amp spread and freq spread take the program well beyond its title.


MODES
 1.   Amplitudes: randomise amplitudes only
 2.   Frequencies: randomise frequencies only
 3,4. Freqs up/down: randomise frequencies upwards only (Mode 3) or downwards only (Mode 4).
 5-7. Amps and Freqs: randomise amplitudes and frequencies (Mode 5); amplitudes, plus frequencies upwards (Mode 6); amplitudes, plus frequencies downwards (Mode 7).

PARAMETERS
 amp spread  Maximum random scatter of partial amplitudes. Values above c.400 seem to make little difference.
Range: 1-1028. Typical chorus value (Mode 1): 40-100. T-V
 freq spread Maximum random scatter of partial frequencies.
Range: Typical chorus value (Mode 2): 1.01 or 1.02; double this for Modes 3/4. T-V

NOTES
To create a chorus effect, keep freq spread to a very small value (<1.05) and/or keep amp spread to a medium value (40-100).
Higher values for freq spread create a burbling effect, while those for amp spread sound much the same for any medium or high value.

© Ensemble Software and Composers Desktop Project 2014