Visit Jeremy's Blog.
Go Back > Forums > Linux Forums > Linux - Distributions > Fedora
User Name
Fedora This forum is for the discussion of the Fedora Project.


  Search this Thread
Old 02-15-2007, 07:31 PM   #1
Registered: Oct 2003
Location: Ellicott City, MD, US
Distribution: Fedora 11
Posts: 67

Rep: Reputation: 15
how is sound directed to multiple soundcards?

This might be a KDE-specific question, but I think it's more system-related, so I'm posting here.

I have two soundcards in my FC4 box: a basic two-channel card connected to small PC speakers, and a more sophisticated multi-channel card for multitrack recording (M-Audio 1010LT), which is connected to various external audio equipment including a monitoring system. My hope, when I installed the second card, was that system sounds (notifications, alarms, etc.) would be routed to the basic card, but I could still do serious audio work on the second card, using JACK.

I was pleasantly surprised when I installed the second card, to find that it worked exactly as I'd hoped it would, i.e. KDE sent all its sounds to the basic card, so I would be able to use the second card with JACK for more complex audio work. Even better was that when I started up amarok to listen to some music, the sound was automatically routed to the better card, and I could listen on the better monitors. I did not have JACK running, and had done nothing intentional to accomplish this. The magic of Fedora Linux!

That was until I recently moved the PC to a different location, and after hooking it back up and rebooting, the function of the cards is now reversed: now KDE's system sounds come out of the second card, and amarok's output is sent to the basic card with its cheap little speakers! Just the opposite of what I want.

So, now I'm forced to figure out how I got lucky the first time around, and what has changed now.

Can anyone give me a clue about how sounds get directed to multiple soundcards (without JACK, that is - this is all about routing sound while JACK is not running). If this really is a KDE thing, then let me know that and I'll take this question elsewhere.

Old 02-16-2007, 12:49 PM   #2
Registered: Aug 2005
Location: Oregon
Distribution: Kubuntu.
Posts: 848

Rep: Reputation: 30
You may need to add index parameters to your /etc/modules.conf (or /etc/modprobe.conf). Alsa doesn't give hardware preferencial treatment the same way as other pci devices. Check the ALSA-Configuration.txt file (part of the kernel documentation) for more information.


amarok, jack, kde, sound

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
multiple soundcards lead to ALSA problems?? timsch75 Slackware 8 03-13-2005 12:10 PM
using multiple soundcards Quis Linux - Hardware 1 02-02-2005 04:41 AM
No sound after changing soundcards rmcb Mandriva 7 10-25-2004 05:05 AM
two soundcards, sound from one mattias800 Linux - General 3 03-01-2003 12:19 PM
two soundcards and poor sound quality joemamma Linux - Hardware 0 02-23-2003 11:00 PM > Forums > Linux Forums > Linux - Distributions > Fedora

All times are GMT -5. The time now is 07:01 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration