Chromatic Harmonica Key Chrometta 10 of C is robustly constructed, reasonably priced, and is the perfect starting point for learning chromatic harmonica. Its larger channel openings in combination with the projecting mouthpiece ensure great response and make it easy for the beginning player to hit single notes accurately. The Hohner Chrometta Harmonica was first released in 1956 and introduced the concept of a divided slide, integrated into the comb/mouthpiece unit, which is still used in this model today. This unique feature makes the chrometta harmonica very service-friendly and is resistant against moisture as well as gliding easily on the lips.