<div dir="ltr"><div>Seems like it worked, at least for my goals. Like you did, I tried to make changes in " install sound-slot-0 /sbin/modprobe snd-...", but nothing really changed. So I did the changes in "options snd-... index=-2 ". In Ubuntu's audio pane the usb device is still not listed. But now in alsamixer the default device is the usb, and the "mataa" software is now working with it. In fact I can't produce sounds with "mataa", but I think that this is another problem. If any correlated problem appears, I'll come back for get help. </div> <div id="gt-res-content" class=""> <div dir="ltr" style="zoom:1">I would like to be able to fix the problem at the root, but as I am new to the Linux world, I would not know where to begin.</div> </div><div> Thank you very much! </div></div><div class="gmail_extra"> <div class="gmail_quote">2013/3/20 Len Ovens <<a href="mailto:len@ovenwerks.net" target="_blank">len@ovenwerks.net</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im"> On Wed, March 20, 2013 12:07 pm, Rodolfo Thomazelli wrote: > Hi, > > in my research I want to use an signal analyser program called "mataa", an > extension of Octave. The extension works with the default audio device. > > I have an usb audio interface called scarlett 8i6. With the help of the > members of the "alsa-user" list (especially Daniel Mack, in cc:), we > resolved some problems of Ubuntu on the device configurations. Now, the > usb > device is listed as the following log shows: > > /proc/asound/cards > 0 [PCH ]: HDA-Intel - HDA Intel PCH > HDA Intel PCH at 0xf7e00000 irq 45 > 1 [USB ]: USB-Audio - Scarlett 8i6 USB > Focusrite Scarlett 8i6 USB at usb-0000:00:1d.0-1.2, > high speed > > The problem is that the usb device is not showed in Ubuntu's audio pane, > so > I can't make it the default device. Typing F6 in alsamixer, scarlett is > listed as well, but I can't controll it or make it the default device. I > think that here is an importante information: the command "aplay > -Dplughw:USB some-test-wave.wav" returns me sound from the device output. </div>I can not tell you why your alsa device does not show up in pulseaudio, it may need a special profile. However, if your USB device is plugged into your computer all the time (from boot) you can do one of two things if your application will grab the default alsa device. What I do is change the order of card module loading. This is done in /etc/modprobe.d/alsa-base.conf There are two ways (according to on line documentation). One is to change the: install sound-slot-0 /sbin/modprobe snd-card-0 install sound-slot-1 /sbin/modprobe snd-card-1 etc. Lines and put snd-usb-audio where snd-card-0 is. I have not gotten that to work for me. What I did instead was tell the unwanted card to load last. Farther down in the file there are a bunch of lines with index=-2 at the end. I added these lines: # ensonic should not be first options snd-ens1370 index=-2 I notice this next line is included twice (ubuntu 12.04): options snd-usb-audio index=-2 You may want to put a # as the first character to comment it out. Then add a line: options snd-hda-intel index=-2 It would also be worthwhile finding out why pulseaudio doesn't see the card. -- Len Ovens <a href="http://www.OvenWerks.net" target="_blank">www.OvenWerks.net</a> _______________________________________________ pulseaudio-discuss mailing list <a href="mailto:pulseaudio-discuss@lists.freedesktop.org">pulseaudio-discuss@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss" target="_blank">http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss</a> </blockquote></div> </div>