What is going on here?
That was recorded live, including the falling snowflakes. Flash can “see” the pattern on each card–depending on the pattern, the computer plays a different note. The result is that you can use pieces of paper like instruments.
Things have not been quiet around the Oakland office. One reason is the recent epic recording session to get some urgently needed musical material finished. As a non-musician, I find it pretty inspiring that people are doing this here. The tracks can be heard in various Tellart projects, including some of the videos elsewhere on this site.