There are many recorded versions of Beethoven’s Ninth Symphony. But a radical new interpretation by the Norwegian conceptual artist Leif Inge, which he calls “9 Beet Stretch,” “digitally elongates a recording of the symphony to make it last 24 hours. The piece slows symphonic time so that movement is barely perceptible. What you hear in normal time as a happy Viennese melody lasting 5 or 10 seconds becomes minutes of slowly cascading overtones; a drumroll becomes a nightmarish avalanche. Yet the symphony remains somehow recognizable in spirit if not in form, its frozen strings fraught with tense, frowning Beethoven-ness.”