> create a raw file with silence. for example 1 second, 16 bit > mono at 44100 Hz: > > dd if=/dev/zero of=silence.raw bs=44100 count=2 > > and convert it to wav: > > sox -t raw -r 44100 -s -w -c 1 silence.wav sorry, that should be sox -t raw -r 44100 -s -w -c 1 silence.raw silence.wav