jgpo@ihu1e.UUCP (John, KA9MNK) (10/03/84)
Here are some interesting phrases taken from an article entitled "Audio Disks Are Gaining Mass Appeal" from "The Wall Street Journal" for Wednesday, October 3, 1984. Posted without comment. "Though the player can be connected to a regular stereo system and speakers, digital speakers are available that produce better sound." "...old standard master recordings can be re-recorded digitally to produce higher quality sound." "Says Mr. [Emiel] Petrone of Polygram, 'We're sure the compact disk eventually will eliminate the black vinyl disk, but we originally thought it would take 15 years.' Now, he says, 'it looks more like seven years to us.'" John Opalko AT&T Something-or-other Naperville, IL ihnp4!iwu1a!jgpo (NOT the machine in the header) (Sure would like to get a look at those digital speakers, though. :-) )
rfg@hound.UUCP (R.GRANTGES) (10/03/84)
[!] Hey, don't knock em. Some magazine or other (no relation to AT&T-something or other) had a picture last year and an explanation of a true digital speaker invented at (would you believe it) Bell Telephone Laboratories, Inc.! It was pre divestiture so I could use that name (gee it felt good). AS I recall it was a 4 bit job. There were 4 cones, one for each bit. They differed in size so that higher weighted bits caused more air to move. I think the mag reported we had no plans to market the thing. Dick Grantges hound!rfg
hrs@houxb.UUCP (H.SILBIGER) (10/04/84)
There is indeed a digital reproducer in the form of an earphone which was patented by Bell Labs. I believe the inventor was Jim Flanagan of the Acoustical Research Depatment. It used acoustical filters for the D/A conversion. There is also a digital microphone (acoustical A/D), making it possible to build a truly digital telephone set, i.e. no analog circuits whatsoever. Herman Silbiger .'