I May Be Able to Use This Next Time I Have An Audio Issue

The only other thing I can think of is with firefox open and playing a youtube page, post your lsof output incase some other process if locking up your alsa.
Here is mine:
lsof | grep /dev/snd:
xfce4-mix 7064 pariksheet 14u CHR 116,0 0t0 7346 /dev/snd/controlC0
firefox 10666 pariksheet mem CHR 116,16 7329 /dev/snd/pcmC0D0p
firefox 10666 pariksheet 97r CHR 116,33 0t0 7299 /dev/snd/timer
firefox 10666 pariksheet 98u CHR 116,16 0t0 7329 /dev/snd/pcmC0D0p

lsof | grep alsa:
xfce4-mix 7064 pariksheet mem REG 8,3 346209 608974 /usr/lib64/gstreamer-0.10/libgstalsa.so

lsof | grep sound:
conky 7028 pariksheet mem REG 8,3 3272153 16369128 /usr/lib64/libasound.so.2.0.0
xfce4-mix 7064 pariksheet mem REG 8,3 3272153 16369128 /usr/lib64/libasound.so.2.0.0

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