CentOS - Feb 2009 - Sound with headphones on: Streamaudio perfect but youtube and system-config-soundcard silent

This afternoon, I bought a pair of ear plugs (the large flat kind that
hook onto my ears).  Plugged them in to test and they work perfectly.
I'm listening to streamaudio.com as I type this.    However, when I
tried to watch a youtube.com video (my wife exercise dancing) just
silence. She had the same video on to test and the sound was fine on
her box. Then, I tried system-config-soundcard and with the volume set
at 100%, just silence. Does this have to do with lower voltages coming
from youtube.com and system-config-soundcard or is there some other
explanation  and a cure? TIA....

On Fri, Feb 6, 2009 at 7:53 PM, Lanny Marcus <lmmailinglists at gmail.com>
wrote:
> This afternoon, I bought a pair of ear plugs (the large flat kind that
> hook onto my ears).  Plugged them in to test and they work perfectly.
> I'm listening to streamaudio.com as I type this.    However, when I
> tried to watch a youtube.com video (my wife exercise dancing) just
> silence. She had the same video on to test and the sound was fine on
> her box. Then, I tried system-config-soundcard and with the volume set
> at 100%, just silence. Does this have to do with lower voltages coming
> from youtube.com and system-config-soundcard or is there some other
> explanation  and a cure? TIA....
>
Progress: I shut the box down for awhile and then turned it back on.
Now, there's sound from streamaudio.com and youtube.com  I'm not sure
why cycling power helped, but it did.   Still no sound from
system-config-soundcard when I try the sound  test.