Abstract: A system for distributing a television program with stereophonic audio via satellite includes a video base band, and audio left and right signals each frequency modulating spaced subcarriers. Special low level tone pulses are transmitted via the respective subcarriers when a television program with stereophonic audio begins and when it ends.Those receiving stations wishing to distribute stereo audio (as via cooperating local television and FM stations) merely detect and disseminate each subcarrier modulation. Receiving stations desirous of distributing monaural audio recognize the stereo program signalling pilot, and enable a left and right program summing amplifier to restore and furnish a compatable, full monaural audio signal.