The idea with Foundry was to make a piece that celebrates the fact that percussionists have this ability to make just about anything into an “instrument.” Snare drums and bass drums are great, but why not write a whole piece featuring non-traditional percussion — things like salad bowls and mixing bowls and piles of wood?

In some cases, I was specific about what instrument to play (timpani, xylophone, etc.). With many of the parts, though, I only described what sound I wanted (play a “clang” ...