Not sure I would use the Doot doots ,Would rather use live BG and the harmonizer and convert to Mp3 for live play. They sound far too synthetic.. The Oooohs and Ahss would pass muster though.

I think the point is not how many times can I use that in a night.....(How many times will you use ANY style in a performance? But the fact that it is even there and adds another color to your palette of opportunity. even if one one song. There are a lot of "new" songs that can be done using the new sounds....even if only once a night...or once on a CD.