Comment 3 for bug 379323

I think that bar is just to give you a rough idea about the noise level of the stream, if you play music or something with varying noise levels throughout the track, then that bar is going to be jumping up and down constantly. If you put the volume slider at 80%, then the meter below could display anything from 0-100% depending on the noise level of the stream at that point in time. A loud song will likely be at 100% the majority of the time, but when the song fades out, that meter will also fade down to 0%.

When I test this some audio streams won't drop below 100% until the slider is at 80-90%, while others drop at 95-99%, and some audio streams aren't loud enough to reach 100% when the slider is at 100%.

Anyway, I don't think this is a bug, so I have closed it, if you disagree then set the bug status back to new.