Aside from how any non-trivial code demands that we consider structure, and how creating a instrument means thinking hard about our own artistic perspectives (both of which are hard, even if good end-results typically look like it's easy) I don't really see what would be very difficult here for ChucK as a system.

I feel everything mentioned *should* be possible so if there turn out to be real issues we might need to look at them together and see what the issue is. 

As I see it the hardest part here will likely be the interface. "real" loopers are so nice partially because they are so simple. That presents real challenges for a "advanced looper". Maybe you for see other issues?

Yours,

Kas.