does it have an option for a remote footswitch to mute? that's all you need then. bass straight into amp, "tuner out" from the amp to your rack tuner, amp mute footswitch to kill your sound when you want, done. it'll still tune when the amp is muted, right?My amp has a mute button
a tuner that's always tuning whether you're muted or not is a good thing in my book! you can look back whenever you happen to be playing a long open note and check your tuning, and grabbing a key and tuning down to drop D is a lot faster when you can hear it while you do it, watching the tuner when you're close so you can get it perfect.
