gusano said : > hello ! > > I just got a new (usb) sound card (ni audio2dj) and in order to > easily use it on my linux machine (ibm thinkpad t40), I had to try > it with pure:dyne carrot&coriander (usb boot). > But I am facing some issues: > > if I use the usb soundcard (qjackd settings are default, just using > alsa driver), all my sc patches use double cpu than with my FW > soundcard > (on my osx machine, the same patches use the same cpu with both my > FW and USB soundcards). > > also, if I use my FW soundcard with qjackd (freebob and default > settings), it complains that ieee1394 and raw1394 are not loaded (no > errors but lots of xruns if I run qjackd as root ?!?). it works fine > with the same settings and same FW soundcard on miso soup.
hm, strange. I'll look into that when I find a minute.. currently busy with Make Art prep :) > > so my questions are: > - are the cpu problem with the usb soundcard be related to bad audio > settings or does it look like a hardware issue (I'm running a > thinkpad t40) hm this is hard to tell, but generally the usb-audio driver from alsa is quite good. For example, I have a cheap (but nice) Zoom H2 which also can act as an audio interface - works out of the box with alsa on all the puredynes so far. To me it sounds like its related to settings but I'm sure that you checked them. Make sure that the buffer size isn't too low (512 maybe) and the sample rate didn't change. Other than that the page for that driver on alsa-project.org doesn't really show anything that seems special. > - how come qjackd doesn't run fine on c&c with freebob by default ? > (that was one of the reasons why I chose pure:dyne some time ago, I > couldn't run RT audio with "basic" distros, I always had issues, > miso soup saved my (linux) audio life =) awesome, well maybe we can repeat that trick ;) > ps: I had to try the usb card with c&c because the latest rt-kernel > have native support for the driver (usb-caiaq). If there is an > (easy) way to get this driver running on miso soup, I'm all open ;) its possible but probably a little bit of a pain. generally, you'd need to download the alsa-source from alsa-project.org, compile and install it (quite simple process) and restart. You should make sure you have persistance enabled though, otherwise you'll have to re-do that everytime! liebe Grüße, karstenx
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