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Apply fade effect to a audio

Terminal - Apply fade effect to a audio
sox input.mp3 output.mp3 fade h 5 00:02:58 5
2011-09-03 13:59:03
User: kev
1
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Apply fade effect to a audio

fade [type] fade-in-length [stop-time [fade-out-length]]

Apply a fade effect to the beginning, end, or both of the audio.

An optional type can be specified to select the shape of the fade curve: q for quarter of a sine wave, h for

half a sine wave, t for linear (`triangular') slope, l for logarithmic, and p for inverted parabola. The

default is logarithmic.

A fade-in starts from the first sample and ramps the signal level from 0 to full volume over fade-in-length sec?

onds. Specify 0 seconds if no fade-in is wanted.

For fade-outs, the audio will be truncated at stop-time and the signal level will be ramped from full volume

down to 0 starting at fade-out-length seconds before the stop-time. If fade-out-length is not specified, it

defaults to the same value as fade-in-length. No fade-out is performed if stop-time is not specified. If the

file length can be determined from the input file header and length-changing effects are not in effect, then 0

may be specified for stop-time to indicate the usual case of a fade-out that ends at the end of the input audio

stream.

All times can be specified in either periods of time or sample counts. To specify time periods use the format

hh:mm:ss.frac format. To specify using sample counts, specify the number of samples and append the letter `s'

to the sample count (for example `8000s').

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