AVS Forum Special Member
Join Date: Jan 2000
Location: Salt Lake City, UT, USA
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I've noticed that many stations that have a second audio channel either use only one side (left-only or right-only), or make the audio sound very low-level, or very tinny.
Seems like some sort of "interval signal" would be preferable....maybe, during lulls in the audio, a quiet "Spanish Alternate Language Channel" or "Descriptive Video Service" voice-over could be whispered (a "Voice-Under"??).
That might be better than compromising the audio quality.
As I understand it, the DD system can transmit a single, mono dialog channel for the various second-language, DVS, etc functions, and substitute it for the standard dialog channel, while retaining the full 5.1 surround....but, it takes a second DD Decoder in the receiver (for the additional DD stream). Since manufacturers won't pay for the second license, they don't build 'em that way, so that negates the entire system. So, auxiliary audios wind up being mono or stereo, to save bandwidth that would be required for, say, two (or three) full 5.1 audios.
Ken English, Sr. Engineer, KSL-TV.
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