What are the kind of instrument?

Answer 1

There are several families of instrument: Chordophones, where the sound is generated by a vibrating string eg. a violin, piano or guitar. Membranophones, where the sound is generated by a vibrating skin eg. a drum. Aerophones, where an oscillating air column is used to produce a tone eg. a Flute or organ. Idiophones, where the actual body of the instrument provides the tone eg. a xylophone or castanets. Electrophones, where electric circuits male or amplify a tone eg. an electronic keyboard or theremin.

Answer 2

-String Instruments (Regardless of whether you pluck, strum, hit or rub the strings.)

-Percussion Instruments (Also, this category traditionally includes friction instruments.)

-Wind Instruments (Both woodwind and brass, plus other materials and, of course, the mighty organ are all included in this category.)

-Electronic Instruments (Ondes Martenot, Synthesizers, etc.)