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In Reply to: It's because I hold myself to specifics and not sweeping generalizations about the formats, posted by michi on April 28, 2003 at 19:09:11:
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...
Follow Ups:
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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