Volume change 'clicks'?

I've noticed that on few occasions after the 10.4.4 upgrade, my volume has behaved strangely, when changing it using the keyboard shortcuts -- the volume increases or decreases lags behind my keypresses, and my speakers emit a soft, percussive clicking noise as I make the changes.
At first I thought it had something to do with my processor load, but it seems to do it even during regular use. It seems to only happen when I'm running it off the battery -- on one occasion when I plugged it into AC power, the problem disappeared. It also seems to emit a single click every time I select Sound in my Preferences pane when I have the problem. Opening the Sound preferences also seems to temporarily relieve it of the laggy, clicking behavior. Again, this problem is intermittent, and the described Sound preference-click only happens when the volume change problem arises.
Anyone have any ideas? I don't really, besides that it might have something to do with 10.4.4 and battery power.

Mine clicks too, and has always done so. I think it's called positive feedback and is quite intentional. The volume of the clicks is in proportion to the volume setting, but other than when at a very low volume I wouldn't expect it to vanish even when plugged in. The laggy behaviour however, I'm sure that's intentional ! Are you running a heavy load of other programs? I don't use audio much so I'm probably not the right chap to try to figure out what's happening there. Do you have any other audio programs running that might have to be notified of a change in volume, thereby slowing things down?
Best wishes, Max

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