Very recently, I have had a RCV4 specific sound problem. Here is the description:1. continuous buzz sound on top of the RCV4 talking 2. does not happen when no RCV4 talking is on3. happens only when OUTSIDE of fs9 (windowed or full screen mode, but ALT-tabbed outside of FS9, to the explorer fior example)4. the same sound problem does not occur when playing music (mp3) on top of fs9. it is purely RCV4 related5. tried to reduce the hardware acceleration. no effectI haven't tried RCV4 re-installation. afraid of something bad and loose it.Tried FS9 with a re-built fs9.cfgUse different sound qualities in FS9 menu=> no impactDo you have a clue?Thank youRegardsGhiom Viguie

if it didn't happen before, and just started, what's changed?jd