| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 359.1 | betch Walters never though of that! | THORBY::MARRA | All I have to be is what You made me. | Fri May 16 1986 08:39 | 9 |
|
> Hey, I can't wait to get "Dark Side of the Moon" and "Wish You
> Were Here" together on a single disk in mono, can you?
"dark Side..." on the right, and "Wish You..." on the left...
different...
.dave.
|
| 359.2 | It died... | MADMAC::SWARD | Have terminal, will travel /Peter | Thu May 22 1986 04:41 | 10 |
|
The last word I read about this in a Swedish audio paper
was that when someone high up in PolyGram found out about
this they started looking up the spec:s for CD:s and it
seems to say "Stereo and about one hour playing time". And
after that they stopped the project.
Another dead good idea.
>>>Peter
|
| 359.3 | 2-hour CD's???? not likely.... | HYDRA::FEINBERG | | Thu Jun 05 1986 17:03 | 32 |
| It is indeed technically feasible to make CD's which go beyond 75
minutes. The are/were two issues:
1) 75 mins was chosen for marketing reasons. What's that? "The
first "record" to get the Beethoven 9th on one side of one disk".
Ergo, 70-is mins.
2) The technology is capable of closer track spacing and smaller
pits. However, there was a tradeoff on player cost and reliability,
and mastering cost/frequency of bad pressings for the replicas.
The 75 mins was chosen as a reasonable compromise.
The track spacing and pit description are written into the Philips/Sony
standard for CD, which *every* producer or players/CDs etc. is a
licensee of. These licensees can produce something else, but it
won't be "CD" (formally).
Also, the players have very little ability to track much variation
in the trackspacing or pit size. What they "have" to do is specified
in the standard.
So.....it's unlikely you'll be able to play "150 minute" CD's on
your present CD player.
(on the other hand: We made an experiment with 3M: we fabricated
a TWO SIDED CD, of about 134 minutes total. It worked! (It was
also slightly to heavy for the CD standard weight and variation.
Lots of concern for burned out drive motors.)
/don feinberg
|
| 359.4 | 75 x 2 = 150 | WBCN::APPELLOF | Carl J. Appellof | Fri Jun 06 1986 09:28 | 5 |
| Yah, but it sounds like the double length CD produces mono sound.
Flip your balance control to the left for the first 75 minutes,
then flip it to the right for the next 75 minutes. Is that the
way it works? (Kind of like bilingual stereo TV).
|
| 359.5 | | AMBER::KAEPPLEIN | | Fri Jun 06 1986 18:00 | 11 |
| re: .4
NO, it works like a phono record, you flip it over and play the
other side. Shouldn't be a new concept :-)
re: .3
Concern for motor life? really?
What are those disk dampers everyone is comming out with going to
do? Mod Squad has one, and Monster Cable and Phoenix are comming
out with ones too.
|