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  #31  
Old 02-28-2019, 05:35 PM
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The 205 is a good first step. I have one and it helps with two channels on the edge. Then!, get an md 90and you’ll love it.
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Amplification > Accuphase A200 (2) / C3800 / C37
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Rental (while the room is being built): Accuphase E650 replaces the C3800 and A200s. All of the other stuff above that's usable, except the turntable stuff. Using TAD CR-1s, rather than the R-1s.

Portables and Cans:

Cans > Sennheiser 800
IEMs > Westone W50, Bose QC20
Amplification > Auralic Taurus
Sources > Auralic Altair, Onkyo DP-X1
IC/SC/PC > Sennheiser Balanced / AQ Yukon XLRs / Shunyata Venom 3 (2) / Black Dragon Balanced


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  #32  
Old 03-04-2019, 10:17 PM
Clark2 Clark2 is offline
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Quote:
Originally Posted by W9TR View Post
...The FM hybrid digital/analog mode offers up to 150 kbit/s of lossy data. The pure digital modes use up to 300 kbit/s bitrate. So basically equivalent to 320 kbp/s mp3.
At the risk of opening a can of worms here, I'll report results of a little Web research (you know the old saw...). The upshot seems to be that the HD codec (HDC) is far superior to MP3 (per bit rate) and makes better use of psychoacoustic principles (recall Ray Dolby's old work on tape recording) to preserve the subjectively important aspects of many sounds at reduced bit rate.

If interested, take a look at the two PDFs attached. (I found these readily with a Google search on "psychoacoustics.") One is a brief article that (interestingly, I thought) outlines some of the techniques behind modern, "perceptually accurate" codecs. The longer is a chapter from a book (I admit I haven't read this yet -- tonight...) that introduces psychoacoustics.

I'm not saying that any of this makes HD FM radio OK -- I still haven't heard it on an audiophile system! -- just that it shouldn't be written off with bit-rate comparisons alone. -- Clark2
Attached Files
File Type: pdf 2004-sdr04-2-6-2-ziegler.pdf (247.3 KB, 3 views)
File Type: pdf 9783319079738-c1.pdf (2.08 MB, 2 views)
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  #33  
Old 03-05-2019, 10:21 AM
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Well, I read the book chapter last night and found it somewhat disappointing. Although it summarizes good information about the functioning of the ear, the "threshold in quiet" and, "masking," it doesn't go into the most interesting aspect of the HDC scheme (actually the SBR method discussed in the technical paper), which I take to be "guided reconstruction" of the deleted high frequency information. (I had read somewhere that the auditory system is not particularly sensitive the precise frequency content of the highs, but they need to be there to sound realistic.) I'll dig more and post anything relevant that I find... -- Clark2
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  #34  
Old 03-05-2019, 08:35 PM
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Considering the number of folks on the FM Tuner forum who have tried and no longer listen to HD (including me), the 'psychoacoustics' of broadcast HD must be mostly miss on the hit or miss basis.
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  #35  
Old 03-05-2019, 10:02 PM
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I tried HD and it didn’t come close to the traditional signal for me
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Main Rig: (waiting on room to be built)

Amplification > Accuphase A200 (2) / C3800 / C37
Sources > PS Audio DirectStream DAC > DirectStream Memory Player > Silenzio by -E- (via Roon/NAS) > Magnum-Dynalab > MD-108T SE / MD-205 > ClearAudio / Innovation / Universal > Lyra / Kleos
Speakers/Cables > TAD R-1 MKII > Verastarr Grand Illusion Statement Copper (1), Gold (1) // REL 212 SEs (2x)
Power > Accuphase PS 1230 (2) / 3 dedicated lines with PowerPorts
Foundation > Rix Rax > Hoodoo / Amp Stands > Stillpoints under as much as my bank account can then accommodate
IC/PC > Power // Verastarr Grand Illusion Statement HC, Grand Illusion Statement > ICs // Verastarr Grand Illusion Signature XLR > Digital // Verastarr Nemesis USB
Other > Audio Desk Systeme Vinyl Cleaner Pro

Rental (while the room is being built): Accuphase E650 replaces the C3800 and A200s. All of the other stuff above that's usable, except the turntable stuff. Using TAD CR-1s, rather than the R-1s.

Portables and Cans:

Cans > Sennheiser 800
IEMs > Westone W50, Bose QC20
Amplification > Auralic Taurus
Sources > Auralic Altair, Onkyo DP-X1
IC/SC/PC > Sennheiser Balanced / AQ Yukon XLRs / Shunyata Venom 3 (2) / Black Dragon Balanced


Kitchen:

KEF LS50 Wireless
Wyred4Sound Modded Sonos Connect
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  #36  
Old 03-05-2019, 11:06 PM
Clark2 Clark2 is offline
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I'm going to keep digging anyhow, now that I'm both curious and interested. Will report anything really enlightening. After learning more about HD, I'd like to listen for the artifacts that we all know are there...
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  #37  
Old 03-06-2019, 10:27 PM
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Quote:
Originally Posted by Clark2 View Post
I'm going to keep digging anyhow, now that I'm both curious and interested. Will report anything really enlightening. After learning more about HD, I'd like to listen for the artifacts that we all know are there...

I realize that you called yourself a dinosaur earlier, but now that you are "curious" you should stop beating a dead horse (HD, FM) and explore streaming as several folks have suggested. You can get high definition sound via streaming!
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  #38  
Old 03-07-2019, 07:32 AM
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Quote:
Originally Posted by nicoff View Post
I realize that you called yourself a dinosaur earlier, but now that you are "curious" you should stop beating a dead horse (HD, FM) and explore streaming as several folks have suggested. You can get high definition sound via streaming!
Or better yet, give a 'known good' tuner a try for the best sound (assuming your station broadcasts a good FM signal).
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  #39  
Old 03-07-2019, 01:42 PM
Clark2 Clark2 is offline
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Quote:
Originally Posted by nicoff View Post
I realize that you called yourself a dinosaur earlier, but now that you are "curious" you should stop beating a dead horse (HD, FM) and explore streaming as several folks have suggested. You can get high definition sound via streaming!
Thanks for nudging me that way here and on the other thread. I did pick up a Bluesound Note 2 Tuesday, but haven't had a chance to try it out yet. I still want to get FM working well though... -- Clark2
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  #40  
Old 03-07-2019, 11:08 PM
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Quote:
Originally Posted by Clark2 View Post
Thanks for nudging me that way here and on the other thread. I did pick up a Bluesound Note 2 Tuesday, but haven't had a chance to try it out yet. I still want to get FM working well though... -- Clark2

Absolutely! I hope it works for you!
Here is an internet station that you might enjoy:

Classical Music - KDFC San Francisco:
https://tunein.com/radio/KDFC-903-s35953/
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