GPU-Ydelse/Eksterne lydkort

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Eksterne lydkort

Hvis du ofte arbejder med den bærbar, men savner musik i høj kvalitet, så kan du bruge et eksternt lydkort til at tilføje et par højttalere. Denne side er beregnet til dokumentation af erfaringer med at få disse kort til at virke tilfredsstillende.

Creative USB XFi 5.1 Pro

Advarsel

Tjek Systemindstillinger -> Multimedie -> Phonon -> Motor og sæt den til GStreamer. Du vil måske se, at VLC bliver anbefalet, men der var problemer med CPU-brug med denne motor, da dette blev skrevet (marts 2010).

Kan Phonon se lydkortet?

Systemindstillinger -> Multimedie -> Phonon vil sandsynligvis have mindst et punkt for intern lyd og forhåbentlig også dit eksterne kort.

Do the speakers work?

Now move to the Speaker Setup tab, ensure that on the hardware section the correct card and profile is listed from the dropdown menu, and your speakers will be listed below. Clicking on each one will test the output.

Problems?

Try the following command:

pacmd list-cards

That should give output similar to this:

If that all looks OK, but your speakers still don't work correctly, try this command:

pacmd set-card-profile 2 output:analog-surround-51

This writes directly to the PulseAudio configuration. You may need to reboot, or your could try

pulseaudio -k
start-pulseaudio-x11
start-pulseaudio-kde

My Front Center and Sub-Woofer still do not work. It may not be possible to get them to work, as they may depend upon the output from the laptop, which appears in this case to be stereo only. If you think your system is capable of better, copy /etc/pulse/daemon.conf to ~/.pulse/daemon.conf and open it to edit. Find the following line:

enable-lfe-remixing

Uncomment it and change no to yes. If your system has suitable output this will enable the subwoofer. At the same time you may like to set the default-sample-rate to 48000, which many people think gives a better sound. Again you will need to restart pulse audio or reboot.

Please add any more information you discover.