Next: qwavheaderdump, Previous: qwavcut, Up: wav tools
qwavfade fade in/out wav files
‘qwavfade option... file...’
qwavfade modifies a wav file applying on it a fade in or a fade out or both.
a fade consists in modifying progressively the level of the wav as if you were slowly increasing or decreasing the volume. a fade in consists in increasing the volume starting from a low level at the beginning of the wav. a fade out consists in decreasing the volume to a low level at the end of the wav.
suppose you want to fade in and out the fantastic song live.in.concert.wav using a fade duration of 3.5 seconds:
first we are going to test:
qwavfade --test --length 3.5 live.in.concert.wav
hear the test fades:
my-wav-player fadein.live.in.concert.wav fadeout.live.in.concert.wav
if you want to try with another duration, jump to the first step and change the length(or --duration) argument.
if you're happy with the tests (omit --test):
qwavfade --length 3.5 live.in.concert.wav
qwavfade doesn't allow both types of fades (in and out) to overlap. if you want to fade in and out a wav file, and the two regions to fade overlap, then probably you made a mistake (maybe you selected a too large fade). in any case, you'll have to fade separately.