The clang of loud dissonant piano chords got you down? Throw on the title track of Neil Rolnick’s latest CD Digits. Sure, pianist Kathleen Supové pounds out some noisy chords, but you would never find these tuneful sonorities in a Boulez sonata. With the addition of digital delay and computer processing, things get a little dizzy, but this 11-minute tour de force won’t leave you with a hangover.