I had a good one. All set to record guitar with a midi drum track. Hit record start playing ... odd drum hits occurring throwing me off in a big way... Brain hurts, try again, same thing. Drums play fine alone?? Did just update Sonar??? Long story short, my audio interface also does audio-to-midi, the midi drum track was selected, and input set to omni! Dos cervesas por favor... Once I figured it out, I started jamming drums on my guitar. Who needs a drummer anyways. Oh ... I do!!!