digital audio radio service sdars system without imaging support however those of ordinary skill in the art will appreciate that the present teachings are not limited thereto the present invention is not limited to the baseline system shown the invention may be used with other baseline systems without departing from the scope of the present teachings in the illustrative embodiment the baseline system 70 includes numerous audio only channels 72 and a first audio channel 71 to which transmitted image visual data from 69 is synchronized and associated each audio channel includes a source 73 a song program scheduler 79 and an audio encoder 85 the source 73 can be a stored database of audio songs programs or can be an audio stream provided by some external audio source along with each song program in the source is pad data program associated data the common pad info provided by the baseline audio only system is artist text labels and song text labels low bandwidth data specific songs programs from the source are scheduled and requested for transmission by the song program scheduler 79 upon a specific song program being requested by the song program scheduler for transmission the source 73 begins output of the audio data along with the pad data for this song program the audio data is sent to the audio encoder 85 which compresses the audio data to minimize over the air bandwidth usage the service layer 91 receives the output of each audio encoder.