Carla Schroder wrote:
On Thursday 04 January 2007 18:01, Forrest Beck wrote:
[snip] Currently I am taking music
from a CD (our campus jazz band has recorded a CD), converting to WAV,
using Audacity to convert the stereo tracks into mono, drop the gain
to -15db, then I use sox to convert to GSM and 8 bit (by typing #>
/usr/bin/sox file1.wav -r 8000 -c1 file2.gsm resample -ql )
Since telephones are so lo-fi, is there any reason to invest a lot of energy
in hi-fi hold music? .wav is uncompressed and lossless, so it should sound
better than .gsm which is a lossy format. But I doubt anyone can really tell
the difference on a telephone. anyway, how long are you leaving your callers
on hold? :)
I would stay far away from .gsm -- I'd go for ulaw or even just leave it
as WAV and let asterisk transcode from there if needed. You'll probably
notice a difference -- music degrades much worse than voice with the low
bitrate codecs.
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