Recorded a whole series of videos back when I did this (2013!) explaining much of the process and idea behind what I did. I doubt I'll ever put them out there, it's lots of dead air and ums and ahs and redundant or unimportant information. This is probably the one big thing worth sharing, which is the Arduino sketch I wrote to accompany the song "Disco Lights" by Alex S. and PinkiePieSwear from the big Balloon Party collaboration album. I liked it, but after running through it an uncountable number of times to correctly program the Arduino sequencing I got a bit sick of it.
But anyway, here's that sketch played out in as good a way as I could.