Well, I'm still not getting any sound, having downloaded the OpenSound source (which I finally realized is the standard release, which has the BeOS stuff all included), recompiled and installed. No dice. I have been digging into sources a bit, though, and I believe I've found the reason for my red volume slider... And unless I'm going mad, everyone else should be seeing it too! On line 304 of .../src/bin/desklink/VolumeControl.cpp, I see: float position = 1.0f * (max - min - max) / (max - min); Hunh...? Doesn't this result in a *negative* position for all min and max? As that position is then fed to the bar drawing...: be_control_look->DrawSliderBar(view, frame, frame, base, leftFillColor, rightFillColor, position, flags, Orientation()); I suppose it's time for me to file a bug, but I thought I'd check first. There must be something else wrong too, because I don't see how that could clobber the rest of the audio. If anyone has any tips on debugging... Cheers, -- Pete --