You've given me a different perspective. I was noticing the odd syncopation as well, but I attributed it to the dots running in circles-- they'd cross the lower

You've given me a different perspective. I was noticing the odd syncopation as well, but I attributed it to the dots running in circles-- they'd cross the lower and upper strings more slowly than the center strings. I had not considered your idea that the visualization is making the music and only when a dot touches a string, and even when that string is out of its resting location.