Structural difference: The single-tone harmonica has a simple and direct structure, only one blowing hole and one suction hole, and each hole is connected by a single reed. The polyphonic harmonica has a complicated structure, with multiple blowing holes and suction holes, and each hole is connected with a different reed, so it can emit multiple sounds at the same time.
Timbre difference: Monotonous harmonica has varied timbre, and can play chromatic scales with strong expressive force. The polyphonic harmonica is crisp and bright in tone, loud in volume and strong in three-dimensional sense.
Pronunciation difference: A single-tone harmonica sounds like a solo with a single reed vibrating. The upper and lower reeds in the same hole of the polyphonic harmonica sound at the same time, just like singing in unison.
Musical expression: Because the single-tone harmonica has only one reed, it is usually used to play simple melodies, and the complexity of musical expression is limited. The polyphonic harmonica has complete scales and chords, and can play complex and diverse music with higher musical expression.
Learning and application: Monotonous harmonica is often used in pop music, folk songs and some folk music styles, suitable for beginners and leisure performances. Polyphonic harmonica is common in classical music, jazz and other styles that need complex music expression, and it is suitable for professional musicians and those who pursue advanced playing skills.
To sum up, monophonic harmonica and polyphonic harmonica are different in structure, timbre, pronunciation and musical expression. The choice of harmonica depends on personal interests and needs. For beginners or people who like simple melodies, a single-tone harmonica may be a good choice. For those who have a certain foundation or pursue more complex musical expressions, polyphonic harmonica may be more suitable.