Hi,I have been using wav files with sample rate of 8khz and 8 bits and I find the sound quality really poor.What is the best sound quality I can achieve on Asterisk?Responses would be appreciated.Rgds,Akpome _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20070613/9e2102bb/attachment.htm
8khz is not the best sampling rate, but that is the best you can do on the PSTN. HOWEVER, you should be able to get fairly decent sound qualify out of an 8khz sound file on the phone line. We have our IVR recorded at 8khz and it sounds fine. Are you using any compression, or G711u/PSTN for your trunks/phones? On 6/13/07, Akpome Akpoguma <akpome_a@hotmail.com> wrote:> > Hi, > > I have been using wav files with sample rate of 8khz and 8 bits and I find > the sound quality really poor. > What is the best sound quality I can achieve on Asterisk? > > Responses would be appreciated. > > Rgds, > > Akpome > > > ------------------------------ > Change is good. See what's different about Windows Live Hotmail. Check it > out!<http://www.windowslive-hotmail.com/learnmore/default.html?locale=en-us&ocid=RMT_TAGLM_HMWL_reten_changegood_0607> > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > >-------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20070613/64fcbb3e/attachment.htm
thanks for you response. Am using sip to access the sound files.The sound files are recorded with higher sampling rate and 'soxed'to 8khz on the IVR machine........... could it be that resampling is responsible for the degradation?Date: Wed, 13 Jun 2007 16:44:10 -0400From: mhoppes@gmail.comTo: asterisk-users@lists.digium.comSubject: Re: [asterisk-users] WAV file best sound quality8khz is not the best sampling rate, but that is the best you can do on the PSTN. HOWEVER, you should be able to get fairly decent sound qualify out of an 8khz sound file on the phone line. We have our IVR recorded at 8khz and it sounds fine. Are you using any compression, or G711u/PSTN for your trunks/phones? On 6/13/07, Akpome Akpoguma <akpome_a@hotmail.com> wrote: Hi,I have been using wav files with sample rate of 8khz and 8 bits and I find the sound quality really poor.What is the best sound quality I can achieve on Asterisk?Responses would be appreciated. Rgds,AkpomeChange is good. See what's different about Windows Live Hotmail. Check it out! _______________________________________________--Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing listTo UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _________________________________________________________________ Make every IM count. Download Windows Live Messenger and join the i?m Initiative now. It?s free.? http://im.live.com/messenger/im/home/?source=TAGWL_June07 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20070614/242cba73/attachment.htm
On 6/13/07, Akpome Akpoguma <akpome_a@hotmail.com> wrote:> I have been using wav files with sample rate of 8khz and 8 bits and I find > the sound quality really poor.8khz is correct, if you are using 8 bits, you need to use 16 bits if I'm not mistaken.