Accordions come in a variety of forms and styles. There are the diatonic accordions, the chromatic accordions, the piano accordions and the button accordion among others. The button accordion was adapted from the simpler melodeon in the nineteenth century.
It has one more row of buttons than the melodeon and its pitch is set a half a tone below or above the melodeon. It is also possible on the accordion to get two notes out of one button by maneuvering the bellows a certain way. This helps the player use less finger movement and allows for more expression when playing.
There are many types of accordions under the button family. The differences range from the keyboard structures, the tuning and the construction of the instruments. A well know variety is the Diatonic button accordion.
It comes with a melody sized keyboard and the keys are the notes of diatonic scales. This can be just one. The bass of the Diatonic button accordion almost always has the principal chords not excluding the root notes of those chords.
Diatonic button accordions are usually bisonoric. This means that for every button used there is two sounds that come out: one when the...