Date: Tue, 16 May 2006 11:42:00 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: Dirk =?iso-8859-1?q?Thannh=E4user?= <dt@dtinnovations.com> Cc: freebsd-isdn@freebsd.org Subject: Re: Sound delay in i4b Message-ID: <200605161142.01292.hselasky@c2i.net> In-Reply-To: <6F0386D8-FEB3-45F1-9C50-F0104D89D813@dtinnovations.com> References: <0CDCE7F4-A7D2-4379-9560-516FFF3350C6@dtinnovations.com> <200605151403.47796.hselasky@c2i.net> <6F0386D8-FEB3-45F1-9C50-F0104D89D813@dtinnovations.com>
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Hi, On Tuesday 16 May 2006 11:19, Dirk Thannh=E4user wrote: > On May 15, 2006, at 2:03 PM, Hans Petter Selasky wrote: > > On Monday 15 May 2006 12:20, Dirk Thannh=E4user wrote: > >> On May 15, 2006, at 9:38 AM, Hans Petter Selasky wrote: > > > > I played around a lot with changing numbers, but i was not able to > get latency down. > Did you ever test with the asterisk echo test application? Yes, but only "ISDN-NT <-> Asterisk" > (maybe=20 > that latency is only here a problem)=20 There is an Asterisk application called MixMonitor, than can be used to rec= ord=20 calls. http://www.voip-info.org/wiki/view/MixMonitor Try recording the call, in .wav format: exten =3D> ... , MixMonitor(my_file.wav) Then open up the wave file in a wave-file editor, or send it to me, and try= =20 measure the echo delay. > Is it possible that there is a=20 > bug inside the application?=20 There is a chance that "chan_capi.c" might be adding some extra delay to th= e=20 sound, when it bridges the call. You installed the latest chan_capi also? > But on the other hand it worked fine with=20 > the zaptel drivers. The zaptel drivers interrupt every millisecond I think, to move data around= =2E=20 If you want that low latency, buy a HFC-4S and enable line interconnect in= =20 'capi.conf'. > I think i will need more time to study sources :-) =2D-HPS
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