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- Newsgroups: sci.electronics
- From: tchannon@black.demon.co.uk (Tim Channon)
- Path: sparky!uunet!gatech!destroyer!sol.ctr.columbia.edu!eff!ibmpcug!pipex!demon!black!tchannon
- Subject: Life after CDs
- Distribution: world
- References: <1992Jul23.221924.681@news.columbia.edu>
- Organization: null
- Lines: 27
- Date: Fri, 24 Jul 1992 20:05:00 +0000
- Message-ID: <712008300snx@black.demon.co.uk>
- Sender: usenet@gate.demon.co.uk
-
- > > > They [Sony] couldn't break themselves of thinking 12" - ala LP's or
- > > > LDs. I took Philips to come up with an under 5" disk. And
- > > > then Sony and Philips got together and standardized on the
- > > > current 12cm disk that sped'ed out at 74 minutes.
- > > >
- > >There is a story (probably apocryphal, anyone know?) that the 74 minutes
- > >time was chosen because it was just long enough to hold the Sony MD's wife's> favourite piece of classical music...
- > >
- >
- > The part I heard was that this requirement wasn't going to work at the
- > designated sample rate of 48 KHz, so they cut it back to 44.1 to squeeze it
- > in.
- >
- No offence meant, but, stories are stories.
-
- If you wonder why 44.1 was chosen, just think about how CD is mastered, the
- practicality of changing extant equipment etc. etc.
-
- A lot of the design of CD goes back to availability of practical
- semiconductor lasers and their wavelength.
-
- As ever compromise, compromise and what we have is in my opinion a very good
- one.
-
- TC.
- E-mail: tchannon@black.demon.co.uk or tchannon@cix.compulink.co.uk
-
-