Newsgroup: it.hobby.hi-fi
Titolo: SACD world: How SACD/CD hybrids could completely replace CDs.

http://sacdlives.blogspot.com/2009/12/how-sacdcd-hybrids-could-completely.html
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SACD/CD hybrids are the perfect software solution for all the worlds
record companies as they offer Stereo in standard resolution in CD
form playable in all devices that play CDs.  Plus high resolution
Stereo playable in SACD, Universal and some BluRay players.  In
addition high resolution Multichannel Stereo with up to six full range
channels of wonderful sound.
Taking a chapter from the history of DVD Videos, parity of pressing
costs can be achieved for dual-layer discs.   In the beginning of DVD
Video it cost considerably more to press a dual-layer than a
single-layer DVD.  However as more and more movie studies started
offering bonus features on the second-layer it began to be used more
and more until it now costs the same to press one or two-layer DVDs.
Indeed no pressing plant even stocks single-layer blanks and when
pressing a single-layer DVD they just leave the second layer blank.
If all four of the major record labels ENDED production of
single-layer CDs tomorrow and all future recordings (Mono, Stereo or
Multichannel) were released as hybrid SACDs, hybrids discs could be
made in such quantities that parity of pressing costs could be
achieved.   At some time in the future when most of the music on
physical formats is on SACD/CD hybrids, CD blanks could be retired.
And the few small companies requesting CD only could be pressed on
SACD/CD hybrid blanks with the SACD layer left blank.
There would be a one time cost of converting all the worlds pressing
plants from CD to hybrid SACD/CD operation, but this will be returned
many fold due to the larger market generated by expending the market
beyond the dying CD market.
While this wholesale adoption of SACD/CD hybrids would solve the
pressing cost issue.  For Stereo recordings there is the additional
one time cost mastering the high resolution layer,  for multichannel
recordings three programs would need mastering.  However this cost is
spread over all the copies of the release sold.  For Pop/Rock that
would amount to less than a tenth of a penny per disc, for slow
selling classical not much over a $1 per disc.
The other concern is that it costs more to record multichannel.
While multichannel does take full advantage of the format, just
because a recording is Stereo or Mono is no reason to exclude it from
from SACD release.  Mobile Fidelity Sound Lab has proven that Stereo
SACDs can sell quite well.  Plus many modern recordings currently are
made in multichannel and only released on Stereo CD. 
So as you see if the record companies do this as a group effort not
only could SACD/CD hybrids totally replace single-layer CDs in a less
than a years time, but they could also save physical formats.  If the
record companies do nothing eventually both CD and SACD will die.  It
is in their hands, will they do the right thing?
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Aliis alia placent
http://i41.tinypic.com/314p93p.gif

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Mi sa che questa idea e' arrivata fuori tempo massimo,  per i
cambiamenti su supporto fisico non e' che ci sia tutta questa attesa,
considerando quanto lentamente il Blue Ray si sta diffondendo.
I supporti di distribuzione andranno avanti cosi' come sono, in piu'
ci sara' il download legale via rete.
Ciao
Mimmo