I have the B2.1u and last week I had it working the way I wanted. Zoom plugged into the computer via USB. Added some music audio tracks. Set it up so the input was my USB and the output was my audio card. Then hooked headphones in my laptop and had play laong which is why I bought this pedal. Well no I have been working with it for the past 2 hours and cant get it to work like that again. Before I didn't have to have the monitor "button" on to here my bass. I believe only the record button. I heard the bass through my headphones. Today I cant hear my basss through the headphones unless I have the montior button on. And then there is a horrible delay. Anyone??? I think I tried every imaginable setting on the Cubase software and in my Audio settings in control panel. I am about to take this back and get a POD XT..... I dont need the effects, just want to be able to hear myself play along with songs through headphones so I dont disturb the neighbors.