You've heard the professional, here is the amateur:

MIDNIGHT SPECIAL ON KETRON SD7
https://app.box.com/s/lchtto4uncblxh5sua4efz9j8ckw3cyg
https://app.box.com/s/q3qwwl1f4g82y448rq9v07r03hk9dehv

Note: just recorded it off the cuff and have never recorded simultaneously vocals and keyboard on the SD7 so far. It is kind of tricky to get the balance correct, as I also stated in my comments on UD.

regards
John