Comment 28 for bug 376024

I'm having the same problem. None of the solutions that I found so far worked.

I've USB HeadSet. It works good in KDE desktop, but when I start Firefox or Konqueror and want to watch Flash movies, it doesn't play on the headset. Even tough it's selected as default device in KDE Multimedia preferences.

I tried:
asoundconf - removed :(
pacmd - I'm getting information that PulseAudio is not default or not running
PulseAudio server - no luck with getting to work
editing /etc/asound.config - doesn't work or I made something wrong

Anyone knows, how can I make my USB audio default in all the whole system, not only in those few (?) apps that respect KDE settings?

I already lost half day trying to get it working, as expected. Please help.