On Tue, Jun 23, 2009 at 5:40 PM, Ron <nha...@gmail.com> wrote: > > >> I have a portal where a user can upload their own MP3, but when a user > >> is using a g729 codec, the music on hold has a crackly sound. using g711 > >> it's very clear. > > > > That could be for any number of reasons, including a overly lossy mp3 > > to begin with. > > the mp3 moh is very clear when i use g711, only on g729 i'm having the > issue, could that be an issue of lossy MP3 still? > > Ron, Keep in mind that G.729a is a low bit-rate CODEC optimized for speech compression. It does not do well with music, or even DTMF tones. G.711, on the other hand, has greater dynamic range, so music sounds better.
It would be nice if Asterisk had an option like CCM that forces MoH to use G.711, while the voice calls still use G.729. Sincerely, Trevor Hammonds
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