What are the classification of instrument?

Answer 1

Depends on how you look at it. In Western music (which system has evolved from the classical Greeks) there are Strings, Brass, Woodwinds, Percussion, Keyboard, and Electronic. Each classification has a wide variety of instruments within it. As an example, a pianoforte, which has hammers which strike strings, is a keyboard instrument, as is a harpsichord, which plucks strings, as is a harmonium, which forces air through reeds, and a carillon, which requires a bell tower and pitched bells, which are struck.

You could classify instruments by pitch: soprano, alto, tenor, baritone or bass.

You could classify instruments by how they are played, or by the materials from which they're made, or whether the instrument can give off only one tone, or is polytonal.