[SoX-users] How can I replace absolute silence (zeros) with noise in HTML5 wav audio.

[jimscarver <jim...@gm...>]

>From some PC's and androids we are getting WAV audio from the microphone with
very short bursts of zeros periodically from an HTML5 browser in Chrome or
Firefox.  I do not know why this is happening and presume it is a bug.  The
zeros are screwing up processing of the audio downstream.  I am looking for
a way to mitigate this issue with sox so that the zero glitches do not break
the downstream system.  I am told that replacing the silence with noise is
about the best I can do.

Currently I use a sox filter to resample the audio down to 8k and tried
removing the zeros in sox but am not if I can do that or what the parameters
should be.  I tried


sox - -t wav -b 16 - rate -I 8000 dither silence 1 0.2 0% -0.1 0.2 0%  -s

That does not seem to remove all the short bursts of zeros.  I would like a
suggestion on what parameter values I should use to remove the zero bursts.

But, I am told that a better solution would be to replace the zero bursts
with noise.  How can I accomplish that with sox?

Thanks,

Jim



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