[linux-audio-user] USB Quattro and Jack questions

Brian Redfern bredfern at calarts.edu
Tue May 27 10:29:01 EDT 2003

I don't know that jack won't work, it seems like its very close to working
on the quattro, but still has some fairly bad bugs that need to be worked
out. I need to learn C better so I can actually help in the bug
extermination effort.

On Tue, 27 May 2003, Patrick Shirkey wrote:

> Denis de Leeuw Duarte wrote:
> > Hi folks,
> > 
> > I've got a few questions about the USB Quattro and Jack. Hope you can 
> > anwer s ome of them:
> > 
> > I'm writing this app and I managed to get my Quattro going with Jack, 
> > but only two of the outputs are available as ports at a time (quattro1 
> > or quattro2). Is there a way to invoke jackd so all four ins and outs 
> > are available as Jack ports? I use the .asoundrc file Patrik Shirkey 
> > wrote, but I understand too little of it to work it out :).
> > 
> I am running it right now with the latest cvs and I can see all four 
> port i/o.
> Now the question is whether or not we have full duplex or if it has been 
> broken recently as Brian suggests.
> I will check now.
> > Another question:
> > 
> > How good/bad are the latencies other Quattro owners have experienced 
> > with Jack at 96k? Is it good enough to attempt close to real time signal 
> > processing in software?
> It's highly unlikely that jack and usb will work well with low lat at 
> any sample rate.
> -- 
> Patrick Shirkey - Boost Hardware Ltd.
> Http://www.boosthardware.com
> Http://www.djcj.org - The Linux Audio Users guide
> ========================================
> Being on stage with the band in front of crowds shouting, "Get off! No! 
> We want normal music!", I think that was more like acting than anything 
> I've ever done.
> Goldie, 8 Nov, 2002
> The Scotsman

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