What is a diatonic harmonica?
From “Post #2 General Stuff” 2 Nov 1992 JE, this is an extension of the previous section: A diatonic harmonica is a harmonica that only has the notes in an ordinary diatonic scale directly available. A variation on the diatonic is the tremolo tuned model, where two reeds that are tuned slightly apart sound at the same time to produce a tremolo effect. Another variation is the octave tuned model where two reeds that are tuned exactly an octave apart are sounded at the same time. This produces more volume and another timbre. A singularly important type of diatonic is the kind that is used for blues music. This one usually has 10 holes, with a draw and a blow reed per hole.
