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sfamplify − amplify or attenuate a soundfile. |
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sfamplify [-d dB][-n][-w][-s][-o output] inputSoundfile |
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sfamplify amplifies or attenuates a soundfile, or reports the range of its minimum and maximum amplitudes. |
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sfamplify -d 80 -o out.aiff inputSound.wav reads in inputSound.wav and either amplifies or attenuates the sound so that the final level is 80 dB, and places the output in out.aiff |
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−d n |
Set output amplitude to n decibels. Maximum value is exactly 20 * log10(2**16), which is about 96 dB. Minimum value is 0. |
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−n |
"Normalize" the soundfile; amplify all values to maximum. |
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−w |
"Wyatt" normalization. Sets maximum amp to -12 dB. (Named after Scott Wyatt, director of the Experimental Music Studios at the University of Illinois. |
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−s |
Scan soundfile, and report values. |
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−o output.wav |
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Place the output in output.wav . |
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This program will only work with WAVE, AIFF, AIFC, and the old NeXT/Sun "snd" format soundfiles, that are 16-bit PCM encoded, with 1 or 2 channels. |
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Arun Chandra <arunc@evergreen.edu> sfamplify is free software. |