Zinc is a chemical element, symbol Zn, atomic number 30

Copper is a chemical element, symbol Cu, atomic number 29

Brass is an alloy of zinc and copper
Elena Margarita Kakaliagou - horn
Hilary Jeffery - trombone
Robin Hayward - microtonal tuba

The microtonal tuba used by Zinc & Copper was sponsored by B&S Musical Instruments and the Berlin Senate.