This is a Texas-style tuning made popular by the late, San Antonio accordionist/accordion tuner-Valerio Longoria. It's a tuning with low octave reeds (bandoneon). Buttons #3, #13 and #24 have a two octave setting (organ). I've modified this tuning to include high octaves on #1,2,12, 22 and 23. Check us out on Facebook. Pinky's Accordion Tuning and Repair. Thank you!
