Freelance music producer Marc Morris has joined Hollywood-based music house DeepMix as the shop's East Coast creative director. ... Martin Walsh, formerly of Arnold Worldwide, has joined Cronin and Company in Glastonbury, Conn., as a senior art director. ... Composers Jared DePasquale, Mark Thame and Ron Walters Jr. have joined the roster of Chicago's Rhythm Café. ... Sound designer and mixer Christopher Fina, formerly of Blast Digitial, has joined New York's Nutmeg Audio Post. ... Michelle Seidenfrau, formerly of ParallaxOne, has joined New York's Sideshow as a producer. ... Kira Lewis, formerly of The Gorfaine-Schwartz Agency, has joined Hollywood music house Musikvergnuegen as production coordinator.