Harmonica Small rectangular wind instrument consisting of free metal reeds set in slots in a small wooden frame and blown through two parallel rows of wind channels. Successive notes of the diatonic (seven-note) scale are obtained by alternately blowing and suckin... more
Harmonica Bands Although harmonica bands and orchestras have generally been forgotten, the harmonica was one of the most popular musical instruments from the 1920s through the 1940s. Its cheapness made it an ideal instrument for teaching music to children during the Dep... more
