FoldTune

Your phone folds. So does an accordion. FoldTune turns iPhone Duo into a squeezebox. Hold it like a book, pump the hinge open and closed, and the bellows breathe: press harder and faster for a louder, brighter sound, ease off for a whisper. Bass and chord buttons sit under your left hand, piano keys under your right, just like the real thing. PUMP THE HINGE • Opening and closing the fold is your bellows. Both directions sound, with a natural dip when you change direction • Bass notes plus major and minor chords on the left, in circle-of-fifths order • A vertical piano keyboard on the right, with octave shift ANY IPHONE, ANY SCREEN • On the outer screen and on every other iPhone, hold the breathe bar under your thumb. Slide up to push harder • Or rock the phone to breathe • Bigger keys on the small screen, two-hand layout on the big one TWO VOICES • Accordion: three reeds per note with…