Chromatic Harmonicas

Chromatic harmonicas traditionally come with 8, 10, 12, 14 or 16 holes. The 12-hole chromatic is available in any of the 12 keys, but C is the most common key used by professionals. Chromatic harmonicas, which have a side button for producing semitones, are designed so that, like a piano, they can play every tone in every octave.

The chromatic harmonica is often considered best for jazz and complex classical music.