Hello
I bought a new ff400 a few months ago.
it works just fine most of the time.
thing is i keep getting these weird errors

in one case the music just stops for a moment and then keeps going
sounds like a small overload or something (which not suppose to happen cause it happens even when i only play tracks on winamp or something)

another thing, which really is bothering me
is that sometimes everything goes crazy, and everything played on my computer starts running in fast forward and very bad sound.
now this happens most of the time when atleast 2 applications are running (for example, when I play with Guitar Rig while winamp is playing a track)
I tried separating the outputs of every program, but it didn't help much
I'm very new to all of this world, so i hope it's quite simple...