[LAU] Jamming over WiFi?

hollunder at gmx.at hollunder at gmx.at
Thu Nov 19 04:33:26 EST 2009

On Wed, 18 Nov 2009 20:31:01 -0500
Michal Seta <mis at artengine.ca> wrote:

> Hi all,
> I am working on a project in which I want 5 musicians to walk around a
> building and play.  They will carry netbooks (mics and headphones) and
> their signals will be sent to a concert hall where it will be
> broadcasted.  Additionally, a "conductor" will decide which individual
> stream will every one of those 5 musicians listen to.  So I need a
> 2-way communication on each netbook and 5 in and 5 out on the server.
> The server will be wired.
> I tried oggcasting but latencies were just unacceptable (10-20
> seconds) so I started experimenting with jack.udp.  I am getting very
> promising results with one machine on a wired LAN and the other over
> WiFi but I get a lot lost packets.  I do not mind to loose some
> quality and some stuttering and I don't mind some latency (although
> jack wants to pump everything in real time) but the netbook that's on
> WiFi has a lot of trouble even getting the audio data out or reliably
> bringing it in, even in areas where WiFi signal is very strong.
> I also tried NetJack but I cannot even establish a master/slave
> relationship between 2 machines (if one is on a WiFi).  Perhaps it
> demands a reliable bandwidth?  I am not sure, I did not spend much
> time with it.
> If anyone has any ideas or experience with something like this I would
> appreciate any input.  I tried ninjam today but somehow client refuses
> to talk to alsa drivers, I will be investigating that in hope that it
> will perform better than ices2+pd.
> Thanks.

Talk to Torben Hohn, he is the main force behind netjack and made quite
some improvements to it very recently.
A couple of days ago Paul Davis (in the US) and Torben (in Germany)
played around with netjack. Paul played some music in ardour, Torben
routed it back to Paul, and there was little delay.
This was Transatlantic and with wifi at Torbens end.

So I think you should maybe visit #ardour on freenode or talk to these
guys some other way, I'm quite sure you can find a solution.


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