I noticed something kinda interesting (and a little irritating) with my Boss TU2 tuner pedal. I noticed that it lowers my input volume when I use it inline with my bass and my amp. Why? I mean if it's off, it should just bypass the signal to the amp right? I only use the pedal to check my tuning and sometimes as a mute soo I can leave my volume knob on my bass set in it's best position in between songs when playing live. My question is this? Is this normal? I do not have alot of experince with pedals, and the Boss TU2 is the only one I own.