From owner-freebsd-isdn@FreeBSD.ORG Tue May 16 09:42:03 2006 Return-Path: X-Original-To: freebsd-isdn@freebsd.org Delivered-To: freebsd-isdn@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BE57F16A43C for ; Tue, 16 May 2006 09:42:03 +0000 (UTC) (envelope-from hselasky@c2i.net) Received: from mail46.e.nsc.no (mail46.e.nsc.no [193.213.115.46]) by mx1.FreeBSD.org (Postfix) with ESMTP id EDEC343D45 for ; Tue, 16 May 2006 09:42:02 +0000 (GMT) (envelope-from hselasky@c2i.net) Received: from acer-a6444i28v1.lan (ti131310a080-14577.bb.online.no [85.165.248.241]) by mail46.nsc.no (8.13.6/8.13.5) with ESMTP id k4G9fxEN006317; Tue, 16 May 2006 11:42:00 +0200 (CEST) From: Hans Petter Selasky To: Dirk =?iso-8859-1?q?Thannh=E4user?= Date: Tue, 16 May 2006 11:42:00 +0200 User-Agent: KMail/1.7 References: <0CDCE7F4-A7D2-4379-9560-516FFF3350C6@dtinnovations.com> <200605151403.47796.hselasky@c2i.net> <6F0386D8-FEB3-45F1-9C50-F0104D89D813@dtinnovations.com> In-Reply-To: <6F0386D8-FEB3-45F1-9C50-F0104D89D813@dtinnovations.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <200605161142.01292.hselasky@c2i.net> Cc: freebsd-isdn@freebsd.org Subject: Re: Sound delay in i4b X-BeenThere: freebsd-isdn@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Using ISDN with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 May 2006 09:42:03 -0000 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