FCC FM broadcasting Federal Communications Commission admixture alloyage amalgamation blending broadcasting coalescence combination comminglement commingling commixture composition eclecticism fade-out fusion immixture integration interfusion interlaced scanning interlarding interlardment interminglement intermingling intermixture merger mingling mixture monitoring pluralism radiobroadcasting scanning shading standard broadcasting switching syncretism telecasting televising tone control transmission vestigial transmission volume control