I'm a little confused.
First, I discovered something just after my last post. And that is that if i go to Applciations | System Settings | Soundcard Detection, it's been set to a "Labs SB Live" sound device which is, I believe, the motherboard's onboard sound device, as I have no sound card.
My sound device is a Kenwood stereo, that is connected by USB.
When I first installed CentOS, it not only detected my Kenwood Audio Device, it detected it twice. When I go to the Soundcard Detection interface, it shows the Labs SB Live on one tab, the Kenwood on the tab to the right, and then a third tab with the Kenwood device listed again.
When I installed CentOS, I selected the Kenwood Audio device as the default, and it's worked perfectly for months, until today.
When I first installed the .asoundrc file, it worked and I could hear sound from within FireFox.
But after installing gstreamer-ffmpeg, it seems that now it is insisting that my sound device be the "Labs SB Live" device. Which has no speakers attached, so of course I can't hear it even if it is working.
So, I'm open to the idea that it's the .asoundrc file that's changed things, but then why did it work at first as far as FireFox goes? Now, no sound at all works in FireFox or anything else?
Can I force CentOS back into using my Kenwood device as my primary - and only - sound device?
Dave