--- On Tue, 5/4/10, Peter Nelson <peter@xxxxxxxxxx> wrote: > From: Peter Nelson <peter@xxxxxxxxxx> > Subject: Re: Jack and Virtual Loopback device as permanent Alsa-to-Jack bridge > To: linux-audio-user@xxxxxxxxxxxxxxxxxxxx > Date: Tuesday, May 4, 2010, 10:41 AM > On Tue, 2010-05-04 at 06:19 -0700, > James Warden wrote: > > > > --- On Tue, 5/4/10, Peter Nelson <peter@xxxxxxxxxx> > wrote: > > > > > From: Peter Nelson <peter@xxxxxxxxxx> > > > Subject: Re: Jack and Virtual Loopback > device as permanent Alsa-to-Jack bridge > > > To: linux-audio-user@xxxxxxxxxxxxxxxxxxxx > > > Date: Tuesday, May 4, 2010, 8:38 AM > > > On Mon, 2010-05-03 at 06:01 -0700, > > > James Warden wrote: > > > > Hello, > > > > > > > > I wrote a WIKI page on how to bridge ALSA > apps that do > > > not "talk jack" at all (like skype) or poorly > (like lmms) by > > > using the ALSA virtual loopback sound card. There > are a few > > > reasons why I chose to use this trick, which I > explain along > > > the WIKI page. Just read it if you are bored and > send back > > > comments if you like :) > > > > > > > > http://alsa.opensrc.org/index.php/Jack_and_Loopback_device_as_Alsa-to-Jack_bridge > > > > > > > > Cheers! > > > > J. > > > > > > Sadly this is not infallible either. After a > while I > > > sometimes end up > > > with just static and need to restart either the > ALSA user > > > or alsa_in... > > > > > > > > Hi Peter, it does not sound too good :/ I have not > experienced 'static' on my system. What are your system > specs ? > > > > J. > > I'm using a Debian Lenny system, but with ALSA 1.0.21 > drivers, on an AMD > Athlon 64 X2 5600+ > > Seems to be some kind of timing issues with snd-aloop. > Rhythmbox, for > instance, will sometimes also get stuck and continue > playing the same > sample buffer over and over, and also sometimes gets stuck > at the end of > a track. > Peter, I let my laptop play music the whole evening with rhythmbox, fired mythtv at the same time and checked some youtube video, all through the jack-loop setup. I have not heard a single glitch. Don't know what is going on with your system. I was running jack at p=1024, n=3, r=48k (21ms). My DAW PC usually runs at p=256, n=2, r=96k (2.7ms) My asoundrc uses the default dmix and dsnoop buffering, so you may want to fiddle a little with explicit options w.r.t buffering. As I mentioned in the howto, there is some latency, that's unavoidable but you can compensate for it if you ever record anything from the loop device inside say ardour. J. > -- > Peter > > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/listinfo/linux-audio-user > _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
