“‘Christian Marclay: Festival’ at the Whitney Museum is aptly titled, since some form of music, much of it live, will be audible at all times during the show’s run. In the late 1970s, Mr. Marclay, an artist-composer-performer, became one of the first musicians to use a turntable as an instrument.” NY Times art critic Roberta Smith and music critic Nate Chinen blog with each other about the show.