Re: [linux-audio-dev] Low-latency audio over IP
On Fri, November 12, 2004 8:30 pm, Fernando Pablo Lopez-Lezcano said: > On Fri, 2004-11-12 at 01:25, Asbjørn Sæbø wrote: >> I am working on what is called "distributed multimedia interaction", one >> purpose of which is to investigate possibilities for ensemble playing > See: http://ccrma.stanford.edu/groups/soundwire/ > > I see this has not been updated in a while, but Chris Chafe is actively > working on the project, see a recent event (AES demo) here: ... which reminds me of my promise to chris to build an autostuff thing around the streambd program, which was used at least for the banff-stanford piano duo. AFAIK it doesn't have sample clock correction but may be will have it in the future. shame on me, it's on my todo list and gaining priority from day to day. bests, martin
Re: [linux-audio-dev] Low-latency audio over IP
Check out MAS http://www.mediaapplicationserver.net/ Jan On Fri, 2004-11-12 at 03:25, Asbjørn Sæbø wrote: > I am working on what is called "distributed multimedia interaction", one > purpose of which is to investigate possibilities for ensemble playing > by remote parties, distributing the audio over IP networks. > > A crucial point is to achieve audio transmission with very low latency. > If anyone could provide me with information on, or pointers to, > open-source software for doing this, I would be grateful. (I have > started to roll my own, but I can hardly defend duplicating work > unnecessarily.) > > Other comments are of course also appreciated. > > > With kind regards > Asbjørn Sæbø
Re: [linux-audio-dev] Low-latency audio over IP
On Fri, 2004-11-12 at 01:25, Asbjørn Sæbø wrote: > I am working on what is called "distributed multimedia interaction", one > purpose of which is to investigate possibilities for ensemble playing > by remote parties, distributing the audio over IP networks. > > A crucial point is to achieve audio transmission with very low latency. > If anyone could provide me with information on, or pointers to, > open-source software for doing this, I would be grateful. (I have > started to roll my own, but I can hardly defend duplicating work > unnecessarily.) > > Other comments are of course also appreciated. See: http://ccrma.stanford.edu/groups/soundwire/ I see this has not been updated in a while, but Chris Chafe is actively working on the project, see a recent event (AES demo) here: http://ccrma.stanford.edu/~cc/soundwire/aes04/demo.html Or more stuff in Chris's page at: http://ccrma.stanford.edu/~cc -- Fernando
Re: [linux-audio-dev] Low-latency audio over IP
On Fri, Nov 12, 2004 at 11:07:14AM +0100, Marije Baalman wrote: > AS> A crucial point is to achieve audio transmission with very low latency. > AS> If anyone could provide me with information on, or pointers to, > AS> open-source software for doing this, I would be grateful. [...] > I know that McGill University has done some work on this kind of > stuff, at their Music Technology department. Maybe you can find > something on their website. Thanks, I will look into that. > I would be very interested in any open source development in this > direction! May I ask what your interests are? Are you working at related things? Asbjørn
Re: [linux-audio-dev] Low-latency audio over IP
On Fri, Nov 12, 2004 at 10:55:32PM +1300, Niklas wrote: On Fri, 12 Nov 2004 22:25, Asbjørn Sæbø wrote: > [...] > > A crucial point is to achieve audio transmission with very low latency. > > If anyone could provide me with information on, or pointers to, > > open-source software for doing this, I would be grateful. [...] > Soundmesh might do a bit what you want. > http://meowing.ccm.uc.edu/~ico/index2nf.html or > http://meowing.ccm.uc.edu/%7Emara/soundmesh/ Thanks, I will look into that. > Please keep me (and/or the list) updated on your progress, I'm very > interested on a cooperation. Noted. I'll just have to do some progress first ;-) The current version is _very_ basic. I have however acheived a latency of 12ms end to end (analog to analog), of which 8.7ms are due to to the buffer of the sound card. So one of the next things is to try on a better sound card. (By the way, a back-of-the-envelope calculation gives me that the absolute minimum latency physically possible is about 67ms (one way) between two antpodes of the earth. And New Zealand is about antipodal to Norway. The ping time to NZ was 330ms (two-way) some day I checked it.) Asbjørn
Re: [linux-audio-dev] Low-latency audio over IP
Hi, Friday, November 12, 2004, 10:25:29 AM, you wrote: AS> I am working on what is called "distributed multimedia interaction", one AS> purpose of which is to investigate possibilities for ensemble playing AS> by remote parties, distributing the audio over IP networks. AS> A crucial point is to achieve audio transmission with very low latency. AS> If anyone could provide me with information on, or pointers to, AS> open-source software for doing this, I would be grateful. (I have AS> started to roll my own, but I can hardly defend duplicating work AS> unnecessarily.) I know that McGill University has done some work on this kind of stuff, at their Music Technology department. Maybe you can find something on their website. I would be very interested in any open source development in this direction! sincerely, Marije Baalman
Re: [linux-audio-dev] Low-latency audio over IP
On Fri, 12 Nov 2004 22:25, AsbjÃrn SÃbà wrote: > I am working on what is called "distributed multimedia interaction", > one purpose of which is to investigate possibilities for ensemble > playing by remote parties, distributing the audio over IP networks. > Nice! I'm working on creating music on the Net :-) > A crucial point is to achieve audio transmission with very low latency. > If anyone could provide me with information on, or pointers to, > open-source software for doing this, I would be grateful. (I have > started to roll my own, but I can hardly defend duplicating work > unnecessarily.) Soundmesh might do a bit what you want. http://meowing.ccm.uc.edu/~ico/index2nf.html or http://meowing.ccm.uc.edu/%7Emara/soundmesh/ > > Other comments are of course also appreciated. Please keep me (and/or the list) updated on your progress, I'm very interested on a cooperation. Cheers, Niklas -- Computer Music PhD-student University of Waikato Hamilton New Zealand
