Loud recalls being interested in musicals at a young age:
I started as a pianist at six years old. I always played piano, and I started music directing shows in seventh grade. We did Gilbert & Sullivan shows that I would teach everyone the parts for and force everyone to sing. I used to save up all my money and come to New York, sleep on my grandmother's couch, see eight shows in a week, and go to Sardi's at the end of the week. She was a real theatre nut too.[2]
He received a degree in music from Yale University in New Haven, Connecticut. It was during his sophomore year at Yale that Loud auditioned for and was cast in Harold Prince's original 1981 Broadway production of Sondheim's Merrily We Roll Along as Ted, the onstage pianist. The production ran for 52 previews and 16 performances before closing; Loud returned to Yale to finish his degree.[3] Returning to New York in 1984, he was cast as the Narrator/Pianist in a production of Billy Bishop Goes to War, starring then-actor Scott Ellis. His association with Ellis led to many of his subsequent collaborations. In 1995 he originated the role of Manny in the original Broadway production of Terrence McNally's Master Class, starring Zoe Caldwell and Audra McDonald.
He created four shows for the 92nd Street Y's Lyrics & Lyricists program: "Let's Misbehave: the Sensational songs of Cole Porter," "A Good Thing Going: the Stephen Sondheim and Harold Prince Collaboration,"[9]On A Clear Day: The Musical Vision of Burton Lane, and Taking a Chance on Love: The Music of Vernon Duke. His arrangements have been heard at Carnegie Hall, The Hollywood Bowl, The Kennedy Center, Merkin Hall, and at Lincoln Center for the Performing Arts' Allen Room. Loud has also enjoyed a long professional relationship with Marin Mazzie and Jason Danieley, whose evening of duets, Opposite You, he created. They performed it at Feinstein's, Joe's Pub, Lincoln Center for the Performing Arts' Kaplan Penthouse, and around the country. The album was recorded by PS Classics. Other recent albums include Jerome Kern: The Land Where the Good Songs Go and Noël and Cole.