The accordion is played by compressing or expanding the bellows while pressing keys.
Glass Armonica (sometimes called Glass Harmonica)
The glass armonica is played by rubbing glass bowls.
The player uses their fingers to block the flow of water through particular holes in order to play different notes.
The jaw harp is placed in the performer’s mouth and plucked with the finger to produce a note.
The theremin is made of two metal antennas. The position of the player’s hands control the pitch and volume of the music notes.