Does anyone have any opinions on the music on hold quality over G729? The stock files seem to sound terrible over it, this is enhanced further by calls coming from the PSTN via a Zaptel gateway. I am only using the stock wav files and have not attempted to use much else so far. I've ruled out timing issues on the system generating the MOH itself (ztdummy on the PBX itself, our Zaptel gateway is a separate Asterisk server). There is no transcoding going on in the middle except via our Zaptel/T1 gateway. When using G711 it sounds fine of course, but this doesn't work well for remote sites with lower bandwidth connections. As of now, I'm torn between getting complaints from end users about the music or killing it entirely (leaving people waiting in queues with dead silence).
Try different music. Compressed codecs are optimized for voice. MoH that is primarily vocals may be better than non-vocal. Darryl Dunkin wrote:> Does anyone have any opinions on the music on hold quality over G729? > The stock files seem to sound terrible over it, this is enhanced further > by calls coming from the PSTN via a Zaptel gateway. I am only using the > stock wav files and have not attempted to use much else so far. > > I've ruled out timing issues on the system generating the MOH itself > (ztdummy on the PBX itself, our Zaptel gateway is a separate Asterisk > server). There is no transcoding going on in the middle except via our > Zaptel/T1 gateway. When using G711 it sounds fine of course, but this > doesn't work well for remote sites with lower bandwidth connections. > > As of now, I'm torn between getting complaints from end users about the > music or killing it entirely (leaving people waiting in queues with dead > silence).
Darryl Dunkin wrote:> Does anyone have any opinions on the music on hold quality over G729? > The stock files seem to sound terrible over it, this is enhanced further > by calls coming from the PSTN via a Zaptel gateway. I am only using the > stock wav files and have not attempted to use much else so far. > > I've ruled out timing issues on the system generating the MOH itself > (ztdummy on the PBX itself, our Zaptel gateway is a separate Asterisk > server). There is no transcoding going on in the middle except via our > Zaptel/T1 gateway. When using G711 it sounds fine of course, but this > doesn't work well for remote sites with lower bandwidth connections. > > As of now, I'm torn between getting complaints from end users about the > music or killing it entirely (leaving people waiting in queues with dead > silence). >Music over G.729, or any other similarly low bit rate codec sounds bloody awful. The only thing you can do to mitigate this is choose simpler music. A single voice singing sounds OK - that's what the codec is optimsed for. A singer with a guitar doesn't usually sounds too bad. As the music gets more complex it goes horribly downhill from there. Steve
If the majority of the MoH is queues, move the location of the queue. On Nov 28, 2007 4:42 PM, Darryl Dunkin <ddunkin at netos.net> wrote:> Does anyone have any opinions on the music on hold quality over G729? > The stock files seem to sound terrible over it, this is enhanced further > by calls coming from the PSTN via a Zaptel gateway. I am only using the > stock wav files and have not attempted to use much else so far. > > I've ruled out timing issues on the system generating the MOH itself > (ztdummy on the PBX itself, our Zaptel gateway is a separate Asterisk > server). There is no transcoding going on in the middle except via our > Zaptel/T1 gateway. When using G711 it sounds fine of course, but this > doesn't work well for remote sites with lower bandwidth connections. > > As of now, I'm torn between getting complaints from end users about the > music or killing it entirely (leaving people waiting in queues with dead > silence). > > _______________________________________________ > --Bandwidth and Colocation Provided by http://www.api-digital.com-- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >
Yes, it is in queues but there isn't anywhere to move them :) Instead we went ahead and generated whitenoise files just above the silence supression threshold to use as an alternate which is a little easier on the ears. -----Original Message----- From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of joakimsen at gmail.com Sent: Friday, November 30, 2007 16:59 To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] G729/MOH Quality If the majority of the MoH is queues, move the location of the queue.