I found it very hard to clap out a steady 3/4 beat while singing along with the MIDI on that last line.

Oh! :::Lightbulb clicks on:::

I didn't even consider clap-ability as a factor... but I'm not one to judge... I get tangled up trying to clap along to "Bingo (Was His Name-o!)"

Okay... So, assuming that Raise all your voices, may sweet song fill the air was the tag line for all four verses, how would you score that to fit a 3/4 time?

I hope this isn't coming across as snippy... I really am curious.

...or is it impossible?

Is this what we could call "music theory by the seat of your pants"?