Quadraphonic panning based on radial angle
This patch enables you to pan a sound to any azimuth angle in a quadraphonic sound system. The abstraction assumes a square configuration of four equidistant speakers: 1 = front left, 2 = front right, 3 = rear left, 4 = rear right. The sound signal comes in the left inlet, and the azimuth angle comes in the right inlet, either as a number or as a signal.