MD: Why does Sony not have earbuds on US models?

2000-07-16 Thread Kenton A. Hoover


Sony doesn't include earbuds on US model products. Does anyone know why?
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Re: MD: Airborne MiniDisc's? Did we ever put together a list?

1999-08-30 Thread Kenton A. Hoover


The IEEE "Spectrum" had an issue on this subject about three years ago.  
In short, even machines that are Part 15 compliant (as all production 
devices have to be) are allowed, and do some, intentional emitting.  
However, unlike the old days when the worry was about interfering with 
navigational aids, the current fear is about interference with the control 
systems on "Fly By Wire" aircraft like any AirBus other than the 300, 767s 
or later generation 737s.  Shielding the avionics is just far to expensive 
to undertake.  However, no one really knows how vulnerable the FBW planes 
are to intentional emissions, and the problem is more the raising of the 
"noise floor" than a single signal disrupting some critical system or 
leading the plane to land in Havana instead of Miami.

On Thu, 26 Aug 1999 22:08:04, Sendmail channeled Alexander Dietrich saying:
> Do you know what it is that makes "laser devices" supposedly
> dangerous ? I believe some airlines forbid the use of laptops
> with CD-ROMs on board. Do they emit a lot of electric noise
> or something ?
> I know I'd rather not listen to MDs for a couple of hours
> than putting everybody's live at risk (and mine).



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Re: MD: Copy-Proof CDs

1999-08-30 Thread Kenton A. Hoover



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It has to do with what you mean by playing "correctly".  Introduction of 
single bit errors will likely not to even be detectable to the human ear.
However, the logical place to insert such errors is on "block" boundries.  
Remember that CD-ROM ripping requires that you read the data off the disk 
in blocks, but the data wasn't written in blocks, so you have to guess 
how to turn the blocks into a single stream of bits.  The attack is to try 
to make the reader confused about how the data is to be aligned together.  
If you are successful, the CD-DA can be played on any reader, but if you 
copy it, the audio will be damaged (or unusable).


On Wed, 25 Aug 1999 20:27:50 +1000, Sendmail channeled "Colin Burchall" saying:
> 
> Kenton A. Hoover wrote:
> 
> >That would require a firmware change to the CD-ROM drive.  Their technique
> is
> >quite clever -- they're inserting CRC errors deliberately, which the
> >CD-ROM units will fix when the data is copied, rendering the copy
> >inaccurate and unusable.
> 
> If they introduce CRC errors, then any unit that is meant to make
> corrections based on these CRCs will produce incorrect data.  This includes
> hifi CD players, which will pass incorrect information to their DACs.  As
> far as I can see, there is no way to cause a CD player to play audio without
> passing the exact data that its DAC is converting to its digital output.
> Also, A CD-ROM drive playing CD-DA is performing exactly the same
> reading/error correction etc. as a CD player is, so it would have to decide
> that a data disc had been inserted in order to be tricked into not playing.
> If a disc is flagged as data, then most CD players will not play it at all.
> How can CRCs be manipulated to make a CD-ROM drive think it is reading a
> data disc, but a CD player still play it correctly as audio?  I don't think
> it is possible.  It might be possible to stop a CD-ROM ripping from a CD-DA
> disc, but simply playing it?  Nope.
> 
> -cb
> 
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> 



| Kenton A. Hoover  | [EMAIL PROTECTED] |
|  Private Citizen  ||
| San Francisco, California ||
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|  Nixon asks God, "When will unemployment go down in the US?"  God  |
|   answers "In 20 years." "Too bad that it won't happen during my   |
|   lifetime," regrets Nixon.  Brezhnev then asks "When will the |
|   Russian people get a happy life?"  "I regret it won't be during  |
|   my lifetime," says God.  |
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Re: MD: memory stick/Digital-8?

1999-08-24 Thread Kenton A. Hoover


Its not that much smaller then compact flash, which has the same power
advantages (CF is about the size of a poker chip) and no one else is 
supporting it.  As has been stated, Sony has a nasty habit of doing this.  
And there is a long list of early adaptors with burned hands too.

On Tue, 24 Aug 1999 12:03:00 BST, Sendmail channeled [EMAIL PROTECTED] saying:
> Have you considered the potential for something as small as memory stick for
> everyday use.
> With no moving parts in a player, the battery life could be extremely long, a
nd
> the medium would be so portable & format free - store video, text & audio on 
the
> same stick.


| Kenton A. Hoover  | [EMAIL PROTECTED] |
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Re: MD: Copy-Proof CDs

1999-08-24 Thread Kenton A. Hoover


That would require a firmware change to the CD-ROM drive.  Their technique is 
quite clever -- they're inserting CRC errors deliberately, which the 
CD-ROM units will fix when the data is copied, rendering the copy 
inaccurate and unusable.

The industry goal is to move the cost of cloning up, not stop it entirely.  
SDMI isn't going to stop skilled computer users from copying digital music 
or breaking the protection scheme -- its just going to make sure that the 
number of people (in the West) doing so is a small number.  That's why "pro" 
gear isn't subject to SCMS -- if you're willing to drop $3K on a MD recorder, 
raw technique isn't going to be able to stop you from making a copy.

On Tue, 24 Aug 1999 16:05:00 +1200, Sendmail channeled Mark Derricutt saying:
> I'd give it 3-4 days max before it's cracked.


| Kenton A. Hoover  | [EMAIL PROTECTED] |
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|   Ah, that old collective guilt. Us melanin-deficient Americans|
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|African-Americans.  Well, speak for yourself, cracker! While|
|your distant kin were doing their inbred thing in the Ozarks,   |
|mine were being chased by Cossacks. |
|-- Don Feder speaking about Clinton's apology for   |
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Re: MD: Travelling with a portable CD or MiniDisc player - useful advice

1999-07-22 Thread Kenton A. Hoover



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Only warning would be that some South and South-east Asian nations use 6V 
electrics on older vehicles (Hindustan Motors in India being one of the 
worst perpetrators).

On Tue, 20 Jul 1999 13:23:48 +1000, Sendmail channeled "Simon Mackay" saying:
> 
> Hi everyone,
> 
> I have realised that if I intend on travelling around with my portable CD or
> MiniDisc player, I would make sure that the mains transformer, 12 volt
> cigar-lighter adapter, and cassette adapter always accompany me with the
> player. 


| Kenton A. Hoover  | [EMAIL PROTECTED] |
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