asterisk users - Sep 2015 - sox convert gsm file

I am using centos 6.7 64 bit and sox to convert gsm files to wav.

When I do that I used to get a header like:
RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 8000 Hz

Now I get a header like:
RIFF (little-endian) data, WAVE audio, GSM 6.10, mono 8000 Hz

And the file does not play in the browser (chrome).

I use sox file.gsm file.wav
I have tried: sox file.gsm -r 8000 -c 1 file.wav

If I use the rasterisk convert file method - that works and has PCM not GSM
but I need to use sox. Reference:
http://www.voip-info.org/wiki/view/Convert+WAV+audio+files+for+use+in+Asterisk

How does one correctly convert gsm to wav for play in the browser?

Thanks,

Jerry
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On Wed, 23 Sep 2015, Jerry Geis wrote:
> If I use the rasterisk convert file method - that works and has PCM not 
> GSM but I need to use sox.
Never been a fan of using a sledge hammer when a tack hammer will do.
> How does one correctly convert gsm to wav for play in the browser?
I use:

 	sox\
 		input.xxx\
 		--bits=16\
 		--channels=1\
 		--encoding=signed-integer\
 		--rate=8000\
 		output.wav

Followed by a trip through:

 	normalize\
 		--amplitude=-22dB\
 		output.wav

-- 
Thanks in advance,
-------------------------------------------------------------------------
Steve Edwards       sedwards at sedwards.com      Voice: +1-760-468-3867 PST