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 SupovĂ© 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.