FIRST disapointment -
If you choose to use the vocal harmoy processor ( who WOULND'T ?? ) you no longer have that second audio input available. I wanted to run my guitar into this too. rats.

If you bypass the TC unit, you can use the 2 inputs separately. The old plug-in card from the PA80 let you use both. Sheeesh...

Well, this is just a small thing. The harmonizer is so much better than the 3k, it's not an issue.