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. 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. Thank you very much! 2013/3/20 Len Ovens <len at ovenwerks.net> > > 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. > > 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 > www.OvenWerks.net > > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20130320/21d03c39/attachment.html>
