Hi, if you use the line input from your soundcard to listen music from a turntable or other device it gets an echo when the SL client is started. It looks like the viewer is putting an echo on the line input and also on the output, even if every sound or stream is muted in the prefs.
Sound coming directly from the computer like CD or MP3 doesn't give problems when SL is open, but using another source like Line-In gets an echo when SL is open, and i mean only open, not even connected to the grid. Soundcard is a Soundblaster Audigy Gamer, no mixing software or other effects settings from the soundcard are used, just the turntables connected to line in. Does anybody have the problem too? Is it again a bug or a feature?