The harmonica, also known as the french harp or mouth organ is very common in blues, country and rock music. The sound is produced by either blowing or sucking air through the holes of the instrument.
- Tuned in one tonelity (ex. E-major)
- It often has 10 holes
- Used in blues, country and rock music
- Plays all 12 tones of the octave (so you can use the same harmonica in all tonalities)
- Has 8-16 holes
- Used in jazz (and by Stevie Wonder)