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In Reply to: So you think it was wrong of me to outline which aren't the defective pressings? posted by michi on April 28, 2003 at 18:34:06:
No offense, really. I just wonder why I am on the receiving end of such harsh criticism of yours... I would call this "hysterical" if I may... Your postings are okay with me, otherwise. And it was good to read in another post that SACD bigmouth Groovenoter himself has some bad pressings out as well...To calm you down:
I have experienced problems with a bad Warner DVD-A pressing once, and the Sonopress hybrid DVD-Audio disc I received for testing did not play the way it should in the Denon A-1, Panasonic RP91/RA71, Harman Kardon DVD 1, my Toshiba DVD-ROM,...
In case you want to try any non-crackative European pressing, be it SACD or DVD-Audio or CD, I am ready to swap these with anyone for any American disc I cannot find here...
Follow Ups:
and it makes my head spin when others do it.Overview. I do not have ANY problem with DVD-A or PCM. It's been made clear that *I* don't like watermarking because I've WORKED with Verance material and don't like it.
And I CERTAINLY don't like the crack problem with Crest hybrids.
I have posted here trying to defend against the "MLP is flawed" crap, which I don't believe.
But, then, I also post against the "DSD noise is audible" crap which I also don't believe in Hirez.
I address specifics. "DVD-A has this problem", but what I get is, "YOU'RE ONE OF THOSE SACD PEOPLE!" ... I didn't draw this line in the sand. I was pushed onto one side of it.
Don't laugh. I think that Hybrid DVD-A/SACDs could be made. I've looked at the UDF directory structure. It isn't impossible.
Mr Stefan Schreiber has outlined his ideas in European audiophile magazines and says he simply wants to end the format war to proliferate hi-rez music. Professionals have rejected his proposals of two-sided bonded discs, and some have even ridiculed his arguments. One of his faults was to suggest that anyone who preferred one format over the other should simply label the "wrong" format side of the disc...A double DSD/MLP mix or re-mix for every new project... I think some DVD-A's would be delayed for light-years then...
DVD-A players should ignore anything extraneous (SACD entries) in the directory tree, but I don't know if that's true with SACD players. (though, it should... Again, they're both UDF.)Just something like this:
Root:\2C_AUDIO
Root:\MC_AUDIO
Root:\AUDIO_TS
Root:\VIDEO_TS2C_AUDIO\2C_AREA1.TOC
2C_AUDIO\2C_AREA2.TOC
2C_AUDIO\2C_TAREA.2CH
2C_AUDIO\TRACK001.2CH
2C_AUDIO\TRACK002.2CH
2C_AUDIO\TRACK003.2CH
2C_AUDIO\TRACK004.2CH
MC_AUDIO\MC_AREA1.TOC
MC_AUDIO\MC_AREA2.TOC
MC_AUDIO\MC_TAREA.MCH
MC_AUDIO\TRACK001.MCH
MC_AUDIO\TRACK002.MCH
MC_AUDIO\TRACK003.MCH
MC_AUDIO\TRACK004.MCH
AUDIO_TS\ATS_01_0.BUP
AUDIO_TS\ATS_01_0.IFO
AUDIO_TS\ATS_01_1.AOB
AUDIO_TS\ATS_01_2.AOB
AUDIO_TS\ATS_01_3.AOB
AUDIO_TS\ATS_01_4.AOB
AUDIO_TS\AUDIO_PP.IFO
AUDIO_TS\AUDIO_SV.IFO
AUDIO_TS\AUDIO_SV.BUP
AUDIO_TS\AUDIO_SV.VOB
AUDIO_TS\AUDIO_TS.BUP
AUDIO_TS\AUDIO_TS.IFO
AUDIO_TS\AUDIO_TS.VOB
AUDIO_TS\DVDAUDIO.BUP
AUDIO_TS\DVDAUDIO.MKB
VIDEO_TS\VTS_01_0.BUP
VIDEO_TS\VTS_01_0.IFO
VIDEO_TS\VTS_01_1.VOB
VIDEO_TS\VIDEO_TS.BUP
VIDEO_TS\VIDEO_TS.IFO...Does anyone think that'd work?
...except for the fact that I might have just mocked up a 15GB disc... But... theoretically?
It seems that both DVD-Audio and SACD players expect incompatible lead-ins on layer 0 - so even if some players (Pioneer, Marantz, Onkyo, recent Sony's) can handle this hybrid, all the others will fail. My Panasonic machine DVD-RA71 (RP-91 U.S.) gets stuck in the CD layer of the Sonopress DVD-A/CD hybrid, the Denon A-1 cannot decide what to do and plays nothing... A DVD-A/SACD hybrid will yield the same results, I'm afraid...
There is room in the DVD Audio spec for dsd tracks.However the sacd security with the pit width processing is a substantial hurdle.
We all have to buy a new player for single sided 'Super DVD Audio Disc' replay.
is that a separate mechanism? Universal players use the same transport.... That's a point though: how would an existing universal player sort out the disc, even if it did work.
Is that the PSP results in an AM modulated signal on top of the normal disc readout signal. Both can be easily detected and filtered.
The PSP signal would have a lower carrier frequency than the normal signal derived from the disc.
Some of the security data is modulated into the PSP signal.PSP can also be used to create a visible image on the disc.
Because the PSP signal has a lower frequency it also means that the servo focussing mechanism must cope with the lower frequency PSP signal (wich affects the reflected light level).
The focussing servo loop mechanism must be less thight and must act slower to cope with the wider bandwith of the signal coming from the light detectors.
This means that the focussing (an also tracking) is less optimized for the datastream that is holding the actual information.
I suspect that disc and player tolerances must be kept thight to ensure stable operation. Wear and tear and long term in drift electrical circuits parameters can affect the playback reliability.
The many reported problems with TOC read difficulties and failures to recognize sacd layers could be related to the problem.
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