Jay Moore wrote:
Hi folks!
I did notice that sox has a -v flag for adjusting volume, but danged
if I can find documentation online that'll tell me what parameter to
pass.
Doing a 'man sox' does wonders:
-v volume Change amplitude (floating point); less than 1.0 decreases,
greater than 1.0 increases. May use a negative
number to
invert the phase of the audio data. It is
interesting to
note that we perceive volume logarithmically but this
adjusts
the amplitude linearly.
So, this is how I increase the volume on my paging
sox paging.gsm -v 4 /var/lib/asterisk/sounds/outx2.gsm
Doug
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