Do harmonicas come in minor keys?
Diatonic Richter harmonicas usually are tuned in Major keys. ... This is why many players use diatonics that are tuned in Minor keys if they like to play Minor sounding melodies or for improvising a Minor Blues solo.
Are harmonicas only in one key?
Every harmonica is in one key or another and sometimes referred to as chromatic, diatonic, chording, and other terms but not "class" ..... Diatonic 10-hole harmonicas come in all major keys A,D,G,C,F,B,Bb, etc. They're also available in Minor Keys.