Mixes together a number of soundfiles, starting at different times and with individual channel selection from the input files.
Flags:
-A = Generate an AIFF output file.
-W = Generate an WAV output file.
-h = Generate an output file with no header.
-c = Generate 8-bit signed_char sound samples.
-a = Generate alaw sound samples.
-u = Generate ulaw sound samples.
-s = Generate short integer sound samples.
-l = Generate long (32 bit) integer sound samples.
-f = Generate floating point samples.
-F arg = Specifies the gain to be applied to the following input file. If arg is a floating point number that gain is applied uniformly to the input. Alternatively it could be a file name which specifies a breakpoint file for varying the gain for different periods.
-S integer = Indicate at which sample to start to mix in the next input file.
-T fpnum = Indicate at which time (in seconds) to start to mix in the next input file.
-1 = Mix in channel 1 from next sound file.
-2 = Mix in channel 2 from next sound file.
-3 = Mix in channel 3 from next sound file.
-4 = Mix in channel 4 from next sound file.
-^ intx inty = Mix in channel x from next sound file as channel y in the output.
-v = Verbose mode.
-R = Continually rewrite the header while writing soundfile (WAV/AIFF).
-H integer = Show a "heart-beat" to indicate progress, in style 1, 2 or 3.
-N = Alert call (usually ringing the bell) when finished.
-o fname = output file name (default: test.wav)
The default values are
mixer -s -otest -F 1.0 -S 0
For example
mixer -F 0.96 in1.wav -S 300 -2 in2.aiff -S 300 -^4 1 in3.wav -o out.wav
This creates a new sound file with a constant gain of 0.96 from in1.wav with the second channel of in2.aiff mixed in after 300 samples and channel 4 of in3.wav outpout as channel 1 after 300 samples.