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SOUNDSHAPER: CDP REFERENCE

HOLD / EXPAND - expand single window at specified time(s)


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SPECTRAL > TIME > HOLD / EXPAND >

SUMMARY
Expand a single analysis window over time, freezing the sound. EXPAND creates a single expansion at time secs. over dur duration, while in HOLD you specify a list of times and hold-durations. Compare with SPECFREEZE and STEPFREEZE.

EXPAND
Extract a single analysis window (spectrum) at time seconds and expand it over dur seconds. Note that dur is the output length.

PARAMETERS
 time  Time in the file where the single window to expand occurs. 
Range: 0 - file length (secs.)
 dur  The output file length; also how long the spectral analysis window is held for.
Range: >0 - any value (secs.) Must be > analysis window-length.
 

HOLD
Hold the sound using a list of times and hold-durations. Like EXPAND, HOLD time-expands the spectrum found at time., but here the expansions occur in the original file, which is lengthened.

PARAMETERS
 datafile  of pairs times and durations. After the duration period, the "hold" is released, until the next time occurs.
(The last time must be less than the file-length.)
Example:
time duration
0.5  0.5
1.5  0.5
2.5  0.5
3.5  0.5
4.5  0.5



NOTES
EXPAND creates a static sound out of a single moment. HOLD is like musical tenuto: it is important to find interesting times where the spectrum might be held. One use is in conjunction with GLIDE, whose transition stops at the end of the output file; it is more natural to HOLD the final sound for a short time.

© Ensemble Software and Composers Desktop Project 2012