I do like the idea of having sounds overlap as a new instrument comes in ... as you'd hear if a band did the song,
Jim...I have to thank you for this remark. I've been thinking for weeks now how I did that two hand overlap because my left hand is good but not THAT good that I could play those "fast" scale runs.
It finally came to me. Take the Beer Barrel Polka I recorded. I'd be playing the melody line (trumpet) on the keyboard in front of me. While holding the last note down, I would keep it down while switching hands (right hand goes to keyboard on my right, left hand still holding notes on front keyboard. The overlap starts...playing the clarinet while holding the left hand notes. Then vice versa. Right on 2nd keyboard finishes. Left hand replaces the right hand while holding the notes. Right hand crosses over the left and back to the front keyboard.
If you don't understand it, I'm not sure I do either. It's been a lot of years. It's kind of like the "Three Card Monty." Very tricky!