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This is a very simple method to learn all the notes of the diatonic accordion. There are 31 notes closing the bellows and 31 notes opening the bellows, which in total would be 62, but with the support graphic we can realize that many notes are repeated. The same happens with the basses since there are 12 basses opening and 12 basses closing for a total of 24 basses. #diegoromeroaccordion