Chirpy/Clicky Sounds in games

[ICEBIKE]

Been playing since 2.3 or something on this Vista box (quad processor 64bit), and with 2.5.2 I'm starting to get some clicky-chirpy sounds in games. Net games and stand alone games. It sounds like static.

Not always, but once it starts it will do it till I exit the game and restart.

I've got my sound settings about the same as previous versions. Do I need to make any other setting changes to get rid of this?