[asterisk-users] MoH - conversion command

[Mike]

> On 07/28/2011 10:53 AM, Mike wrote:
> > Hi,
> >
> > I've been trying to get MoH files to sound decent. I've got a hold of
> > Royalty-free Classical music (a safe choice for most of my customers)
> > and I`ve been trying to convert them to the normal telephony/Asterisk
> > format using sox. Unfortunately, it sounds really bad. I don't expect
> > concert hall quality of course, 8000KHz being what it is, but is there
> > a better way to convert from good quality .wav files to 8000Khz ? Am I
> > using the wrong tool?
> 
> Can you elaborate as to what you mean by "really bad"?  What acoustic
> artifacts are you encountering?
> 
> Are you testing from a mobile phone?  Cell phones use variable bit rate
> codecs and at times, vicious compression, depending on signal strength and
> other factors.  Anything is going to sound like crap on them regardless.
> Make sure you are testing from a reasonable endpoint.
> 

Alex,

I should have said I am trying this both from a landline using ulaw, and
from a Polycom phone using g729 codec.  G729 is noticeablty worst, as you`d
expect, maybe this is what is reported by my customers.

Is there any way to have a "decent" g729 file, or should I just give up and
change everyone to ulaw ?

Mike