I noticed it has an effects loop on/off switch with the footswitch. It also has effects loop signal level controls for the in and out. Could you turn down the effects loop out and use it as a tuner mute and put a tuner on top of the amp? I have run tuners in effects loops on top of my amps for years, but have never had level or footswitch controls. It would be a great feature to be able to mute post tuner when live (if I ever get around to playing live again).