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New Miller 71 Grateful Dead SBD's - Page 4

post #46 of 97
Quote:
Originally Posted by regal View Post
If you have a lot of the official releases I highly recommend an HDCD DAC, or HDCD CDP, makes a world of difference. When you listen to the HDCD official releases without HDCD they don't sound right.
Many, but not all, of the official HDCD format releases take advantage of peak extension. With peak extension there is an easily noticeable difference between the HDCD decoded audio and the standard audio.

Fortunately you can get the peak extension back using the software HDCD decoder. dBpoweramp can decode the HDCD code and so can CUETools. The software decoder though can't do much with the special transient filters that HDCD can do (I don't believe they've been able to reverse engineer them and even then I think the audio would need to be upsampled to be able to take advantage of them).

If you've got any official HDCD releases and don't have an HDCD DAC or CD player then give the software HDCD decoder a try. The decoder can let you know if the CD has peak extension.

Some of the HDCD discs don't have peak extension or transient filters. The only HDCD feature they seem to have is the special HDCD dithering. Yet the discs have the HDCD logo. Whether custom dithering is a useful feature worthy of the HDCD logo can be debated. But for those dics with peak extension the HDCD decoding is useful.
post #47 of 97
Quote:
Originally Posted by subtle View Post
Are the shows from 4/26 and 4/27 posted somewhere other than bt.etree? At the moment I'm only seeing 4/28 and 4/29 over there.
If the other shows are not at etree, I am sure they will eventually get there.

and PM sent
post #48 of 97
Thread Starter 
Quote:
Originally Posted by Ham Sandwich View Post
Many, but not all, of the official HDCD format releases take advantage of peak extension. With peak extension there is an easily noticeable difference between the HDCD decoded audio and the standard audio.
.
Norman uses peak extend on all his releases, this is why I say that the HDCD decoding helps eliminate the compression.

I'm also a believer in the dithering, having the studio's ADC using the same dithering algorith as your DAC at home makes sense, it eliminates phase distortions. You can see from my signature that all my DAC's use the HDCD PMD100 chip, thats all 'cause of the Grateful Dead releases.

Deep down though I really wish Norman hadn't used HDCD from the begining, because it means you can't use digital EQ, volume control, or any sound affects from your computer software. But I've still had many enjoyable hours listening to the official releases without any DSP.
post #49 of 97
I agree that HDCD is pretty critical for Deadheads to have.

Quote:
Originally Posted by subtle View Post
Also curious, does anyone know if there is a definitive Dead discussion forum similar to head-fi for headphones?
I read and post here:

DeadNetCentral
post #50 of 97
maybe I should re-try that hdcd stuff again...

was there ever a software decode for this so that we can convert it to 'standard' 24bit audio?

I'd hate to have to do a back-to-back dac-adc just to capture to 24bit (which would only be 20 honest bits, at best).
post #51 of 97
Quote:
Originally Posted by Ham Sandwich View Post
Fortunately you can get the peak extension back using the software HDCD decoder. dBpoweramp can decode the HDCD code and so can CUETools. The software decoder though can't do much with the special transient filters that HDCD can do (I don't believe they've been able to reverse engineer them and even then I think the audio would need to be upsampled to be able to take advantage of them).
so there's only a partial software solution. that's too bad.

I still do have a pair of DDE3.0 dacs; one works (sort of) and the other seems to be in bad need of repair (pcb is in bad shape due to many previous repairs). but they do have that PMD chip and I wonder if its possible to take the digital out (i2s?) from a tap point. I never gave it much thought until now..

are any dacs or cd players coming with hdcd anymore? ANY of them?

I thought microsoft bought the company to just bury the standard (?)
post #52 of 97
IIRC, Windows Media Player correctly decodes HDCD on playback - after all, Microsoft bought Pacific Microsonics, the company that invented HDCD.
post #53 of 97
so is it as simple as just capturing the spdif-out after it went thru the MS player?

granted it will still be 16/44.1 but at least it will be 'bit fixed' 44.1, so to speak
post #54 of 97
The Microsoft software implementation was what was reverse engineered to develop the more general HDCD software decoder. The Microsoft implementation only does peak extension and gain, no filters. So there's no implementation to reverse engineer to figure out the correct filters.

The Doom9 forum has some discussion about it by the developer (search for hdcd.exe).

Fortunately most of the Grateful Dead HDCD releases don't use the filters so the software decoder seems to work well. I don't have a real HDCD DAC to compare against.

Here's what the software decoder reports for the Grateful Dead CDs I have:
Quote:
Grateful Dead - Dick's Picks Vol.24
HDCD: peak extend: yes, transient filter: none, gain: none


Grateful Dead - Dozin' At The Knick [HDCD]
HDCD: peak extend: yes, transient filter: none, gain: -4.0dB..0.0dB


Grateful Dead - Europe '72 [Bonus Tracks] [HDCD]
HDCD: peak extend: none, transient filter: none, gain: none


Grateful Dead - From the Mars Hotel [Remastered] [HDCD]
HDCD: peak extend: none, transient filter: some, gain: none


Grateful Dead - Nightfall of Diamonds [HDCD]
HDCD: peak extend: yes, transient filter: none, gain: none


Grateful Dead - Rocking The Cradle Egypt 1978 [HDCD]
HDCD: peak extend: yes, transient filter: none, gain: none


Grateful Dead - Steppin' Out With The Grateful Dead - England '72 [HDCD]
HDCD: peak extend: yes, transient filter: none, gain: none


Grateful Dead - Terrapin Station [Bonus Tracks] [Remastered]
HDCD: peak extend: none, transient filter: some, gain: none


Grateful Dead - The Arista Years [HDCD]
HDCD: peak extend: yes, transient filter: none, gain: -4.0dB..0.0dB


Grateful Dead - Workingman's Dead [HDCD]
HDCD: peak extend: none, transient filter: none, gain: none
I've noticed that the discs like Terrapin Station that do the transient filter (and no peak extend or gain) sound a little weird when using the software decoder. But I don't have a HDCD dac to compare the sound with.

For the discs that do peak extension and no filtering I like what the software decoder does. For discs that use filtering I don't do the software decoding.
post #55 of 97
I downloaded the 4-28 show and the mastering really surprises me for such an old live recording. Anyone wanna recommend another live show that I can get from eTree?
post #56 of 97
If you like the mastering, try 2-13-70 and 2-14-70, the last miller upgrades.
post #57 of 97
Grab the 7-13-85 and 7-14-85 that are on bt.etree.org now - I know they are cassette masters, but trust me they sound great.
post #58 of 97
Quote:
Originally Posted by spinneresque View Post
If you like the mastering, try 2-13-70 and 2-14-70, the last miller upgrades.
Is there a particular version you would suggest for 2-11-70? I've got it on mp3 but have a suspicion that it's not the full show.
post #59 of 97
Quote:
Originally Posted by Skylab View Post
Grab the 7-13-85 and 7-14-85 that are on bt.etree.org now - I know they are cassette masters, but trust me they sound great.
OK but for Gd newbies, be aware that 85 is very different sounding than '70... great shows for sure but Jerry's voice in the 80's can be hard to get used to.

humble opinion of course...
post #60 of 97
Quote:
Originally Posted by deadhead12 View Post
Is there a particular version you would suggest for 2-11-70? I've got it on mp3 but have a suspicion that it's not the full show.

The best one right now appears to be this:

db.etree.org - Source Detail for Grateful Dead 02/11/70

There is a rumor that an even better upgrade is on the way.

Friendly advice: Switch to lossless!! Esp with Dead shows the difference is enormous, and even more especially if you have good headphones.
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