I've been going through the ultrabeat tutorial and have been hung up on sidechaining. First, I have oscillator 1 on and side chain selected. Then I selected an audio track (8) I'd recorded a guitar part on in the side chain window in the upper right of ultrabeat. I then turned the track volume down on track8 and turned on the sequencer. When I hit play in Logic the only thing coming through was a sequenced beat. I didn't hear the guitar track coming through Ultrabeat. What am I missing?