A FREE Educational and Fun App to learn to play the Diatonic Button Accordion. Genuine Accordion Sounds Professionally Recorded from a Leading Brand Button Accordion. Super-responsive, plays like a Real Button Accordion! 4 Different Accordion Sounds: Deluxe, Norteño, Texano & Vallenato. 5 Complete Tunings GCF, EAD, FBbEb, ADG and BbEbAb. 5 Register Sounds. 34 Buttons.