The sublime blending of voices. The shimmering highs. The lush lows. Sweet tenor tones rising above rich lead melodies. Harmonies that warm the soul. At age 7, Patrick McAlexander discovered the singing world of barbershop, close four-part harmony in a cappella. And it gripped the fella. Now 30, he’s still happily in its vise, this many years after first performing as a young boy in his dad’s barbershop chorus. “I’ve been around music, specifically barbershop, my whole life.