Can anyone who has one of these verify if you do or do not get an audible glitch when pushing and releasing the mute button? I have one, mute is dead silent, but a 2nd one I got, an A05 (just to get the removeable feet), the mute emits a fairly loud scratchy sound when pushing and when un pushing the mute button. It comes out the speaker loud n clear, don't know about the d.i. I love the A05 design for the feet, they are awesome, but I use the mute alot, and it's really, really not cool to keep having that coming out of the amp, especially when cranked. Thanks.