There seems to be a rather nasty bug in the Axe IO Control Panel.
This has happened to me a couple of times:
After restarting the computer, the faders for Out 1-2 in the Axe IO control Panel will show "0" and be at the top.
But this does not reflect the true system volume. So if I touch the faders, the volume will EXPLODE if 0db is much louder than the current actual volume levels. After I adjust the faders, the volume levels are correct and are displayed correctly.
I almost blew my speakers thanks to this.
Why don't the faders indicate the current volume level before you touch them?
(It can also happen if I have not been connected to the Axe for a while. My main computer is a Macbook Pro which I also use at work so it is not always connected at home.)
I should add that I truly *love* the Axe IO, it's probably the most guitar-friendly computer gadget I have ever owned. Had it for six months now and it's so useful.