Okay, i play in a church band and have had enough of lugging my 4X10's every sunday, so i got a DI box. I got the Apex ADP1 Direct Box. then i realized i would need an A/B box to switch between my two basses that i use on sundays(Jazz 4 and Jazz 5.) so i got the Apex ASB1 A/B-Y Switch. now i understand how to use them. i run it bass 1-a bass 2-b then one line to the from instrument on the DI then a line from DI-little rig thats smaller just so i can hear myself better. now where would/could i add a tuner so that i can tune, but tune each bass and have it muted?