Hi Jim,
Just had a chance to watch your video and it sounded great. Very smooth transitions between tunes. When you got to the Battle Hymn of the Republic, I first thought
great use of the harmonizer then saw your partner show up on camera and blew the whole illusion for me.

I noticed you did use the harmonizer on Swanee River though. If I may make a suggestion 'just something to try'; instead of using all 3 vocal harmony parts, try just using a single harmony part above your voice or at the most two. The harmony will more intelligible that way.
Keep up the good work. I'll post something soon to show off my new PA588.
Best Regards,
Dave
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Wm. David McMahan
LearnMyKeyboard
JazzItUp Band
The Modulators