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SOUNDSHAPER: CDP REFERENCE

SLICE - partition spectrum
 

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SUMMARY
Cyclically partition the spectrum into separate files by frequency band.  The separate files can then be given individual treatment, such as delay, panning, transposition etc., after which they can be mixed or interleaved to reconstruct a single sound. In Soundshaper, the files are normally output to the patch grid in separate rows.

Bands are selected by the bandwidth parameter*, defined as number of analysis channels (Mode 1), frequency (Mode 2) or pitch (Mode 3). 
The extracted bands are distributed to the output files in turn. If the number of bands exceeds the number of output files, the distribution cycles round to File 1, then File 2, etc.  

The cyclical nature of this distribution may be compared with the issuing of playing cards in a card game: with 3 players, Player 1 would get cards 1, 4, 7, etc; Player 2 cards 2, 5, 8, etc; Player 3 cards 3, 6, 9 etc.

MODES
 1. Channel Bands: Extract bands of equal numbers of spectral analysis channels
 2. Frequency Bands:  Extract bands of equal frequency width
 3. Pitch bands: Extract bands of equal pitch interval (in semitones)
[4. Slice by Harmonics: not yet implemented.]

PARAMETERS
 file count  The desired number of output files.
Range: 1 - no limit, but restricted in Soundshaper to 10, to fit within 10 patch rows. May be exceeded if the output is not being sent to the patchgrid.
In CDP documentation, this parameter is called bandcount.
 bandwidth Width of each extracted band.
Mode 1: number of analysis channels; Range: 1-no. of channels (Soundshaper gives max. 500)
Mode 2: frequency (Hz); Range:
5-20000 Hz
Mode 3: Pitch interval; Range: 1-36 semitones.
These ranges are arbitrary and could be exceeded; e.g. 2 files each of 48 semitones would be feasible.
* In CDP documentation, this parameter is called
chanwidth

NOTES
Depending on the source material, some bands may be silent or have low level. To avoid the cyclical distribution of bands, choose a number of output files appropriate to the bandwidths: e.g. Mode 3: 4 files of 5500 Hz; Mode 4: 6 files of 21 semitones. Conversely, the Moiré effect of the cycling may be desirable, e.g. 4 files of four semitones each (cycled) could be useful for channel separation and panning.

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