Many thanks for that. I have tried Linus' solution but it doesn't solve my problem.
I am hearing crackles and pops in other sound applications as well (rythmbox, banshee, audacious, vlc, totem, etc.) so my problem isn't specific to flash. The crackles and pops are very rare when I start an application and then they seem to become more frequent. I have a triple boot system with Windows 7, Fedora 14, and Ubuntu 11.04. Both Windows and Ubuntu don't seem to have this sound problem. This is frustrating since I prefer Fedora 14 (I didn't enjoy working in Fedora 15 - Gnome 3 feels like handcuffs, even the fallback) over the others.
Anyone have other suggestions ? Is there some specific information I should post (ie: alsa-info, lspci, lsmod etc.) to help track this down ? (I didn't want to post too much information in case it is a simple problem to fix).
Is there a better forum to post this in ?
Thanks in advance
update: just checked Ubuntu and Windows again...all OK so this seems to be a Fedora problem. Until I get this sorted, I'll have to work in Ubuntu!!!