How many types of Harmonicas are there? I say as many as needed for the many types of music it is used for. Harmonicas come in all shapes and sizes, it is mind boggling. At SPAH each year all types are showcased.
A Diverse group of players from around the world come to perform, share, learn, teach and just hang out with other players - like a pilgrimage of epic harmonica proportions!
1:Diatonic:The standard 10-hole major diatonic harmonicas come in all 12 keys of music and allow you to play a complete 7-note major scale of the key of the harmonica.
2:Chromatic: The chromatic harmonica has a button on the side, which when NOT used, allows you to play a normal major scale in the key of the chromatic. With the button depressed, you have all the missing half-step notes in-between the major scale notes. This allows you to play in any key and any type of
The bottom row has all the natural notes - it's just a C major scale, running from E to E.
The top row is not in C# as you might expect. It's in Gb. Why?
Well, the primary activity in most simple bass lines is to play the root and the fifth of the chord. it's easier to move between these notes if they're on the same row. Most chords have perfect fifths. The C scale does not give you a perfect 5th above B (F is a diminished 5th). B doesn't even occur in the C# major scale, so this would be a poor choice. The B major scale would not give you a perfect 5th on (or Bb), so that's out, too.
It just happens that the C scale and the Gb scale in combination give you all the perfect 5ths on one row or the other.
here is the layout for the regular bass:
F Gb Ab Bb B Db Eb F Gb Ab Bb B Db Eb
E F G A B C D E F G A B C D E
Note how the hole placements are staggered, to put the flat/sharp notes in between the natural notes.