Any FM using higher HD-2 bitrate than HD-1? - AVS Forum
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post #1 of 3 Old 12-24-2011, 04:36 PM - Thread Starter
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I posed this question not knowing if this has been done. I do know that with even some modestly accurate speakers, you can hear the crunchy metallic overtones of high frequency detail on many a battered under cut secondary channel, when great attention is placed upon the primary HD-1 channel audio.
I figure that if a station had really prided itself on presenting it's secondary service with great clarity, in other words if a format really required great digital texture, that a station could back off the bandwidth on their primary HD-1 and donate it to their HD-2 and use smart limiting on their analog FM for their primary to provide "retroactive" sonic quality like great FM audio of days gone past. I wonder if in some engineering circles if the request for this option was even thought of for a fleeting moment with a live in house alternative programer using HD radio but taking pride in all factors of digital delivery , very seriously.

"Backwards compatibility": It saved your B/W TV until you got tired of it; "It" could save our Constitution until we get tired of FREEDOM as we've come to know it
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post #2 of 3 Old 12-27-2011, 11:06 AM
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It usually takes a significant amount of bits to make a noticeable improvement in sound quality. When the Entercom stations shuffled their HD-2 stations around, it turned out that one station ended up getting another 8 Kbps. I couldn't tell the difference.

When our very last 96 Kbps station here decided to get an HD-2 (another pointless simulcast of another FM station) and chop their bitrate in half, the difference was depressing. I used to tune into the station and marvel at how much better digital sounded when it faded in over analog. Now I hardly hear any difference.

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post #3 of 3 Old 01-02-2012, 07:49 PM
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on Steel City Media's (WLTJ-WRRK Pittsburgh) HD's I have HD-2,3 & 4

I have them at 32kbps for HD 1,2 & 3 and 24 kbps for my HD4
HD-1 = 32kbps
HD-2 = 32kbps
HD-3 = 32kpbs
HD-4 = 24kbps

I have lots of HD listeners and I really worked on the processing to remove any flange or other artifacts in the audio and I am pleased with the results.
all HD's are running music and my HD-4 sounds just as good as the selective high bit rate channels on satellite radio, say Sixty's on 6 or classic rewind

I went ahead and created http://bobhd.com as a 32kbps stream, so you can actually hear what my 32 kbps sounds like.
there is no special audio player needed my engine uses your web browser defaults
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