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"Eric Woudenberg, Minidisc.org Editor" wrote:
>
> Hi Joshua,
>
> [I'm cc'ing to the MD mailing list]
>
> Joshua writes:
>
> >I've seen mini CD's that are half the size of CD's that play in cd =
> >players. If I took off the casing of the MD, would I be able to play =
> >the CD in a regular CD player. If not, is it because the size is =
> >different, or the compatibility?
>
> It's an interesting question. There would be multiple problems trying
> to play a bare MD in a CD player:
>
> 1) Physical Disc Diameter:
> Mini-CD (hereafter "MCD") = 80mm
> MD = 64mm
> 2) Lead-in diameter (where the data starts on the disc):
> MCD/CD lead-in = 46mm
> MD lead-in = 29mm
> 3) Chucking mechanism:
> MCD/CD = 15mm chucking hole
> MD = magnetic clamping through steel plate on MD (with alignment hole)
> 4) Recording system:
> MCD/CD = PIT/LAND
> MD = PIT/LAND for pre-recorded, Magneto-Optical for recordable
> 5) Encoding:
> MCD/CD = PCM, MP3, WMA, etc.
> MD = ATRAC, ATRAC3
>
> The MD and CD track pitch and optical parameters (spot size) are the
> same however.
It's a shame the JVC combination mechanism used in their KD-MX3000,
MX2900, etc. car stereos didn't take off. I'm surprised Sony didn't try
something similar. What better way to get people hooked to MD than by
offering MD equipment that can also play their CDs? This probably
wouldn't work for a portable, but in a car where both CD and MD can fit
into a single DIN (and use a single mechanism), I can certainly see this
as a huge benefit. Many people might be indecisive about buying an MD
car stereo as it would mean they can't play CD's in the car anymore, but
a combination mechanism would take care of that indecision. Especially
if a combo player only cost a little bit more than a standard CD
player. I have a KD-MX3000, and I think it's great! It would be nice
if the combo mechanism sold in enough numbers to drop its price to where
it could be offered in everything. To where every CD or DVD player sold
could also play and record to MD (or at least play them).
Shawn
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