HDTenEightyP/NetNews huggingface dataset:
From: smee@bristol.ac.uk (Paul Smee)
Newsgroups: rec.audio
Subject: Re: Mobile Fidelity....
Date: 18 Dec 92 10:35:31 GMT
Reply-To: P.Smee@bristol.ac.uk (Paul Smee)
Organization: University of Bristol

In article <535@bit.UUCP> grego@bit.UUCP (Greg Sanguinetti) writes:
>>In article <1992Dec12.210233.16182@nntpd2.cxo.dec.com> winalski@adserv.enet.dec.com (Paul S. Winalski) writes:
>>>The claim is that, since gold is a more malleable material than aluminum,
>>>the gold foil will adhere more closely and more smoothly to the pits in the
>>>CD, thus providing a better surface to be read by the laser, and reducing the
>
>In article <1992Dec16.094829.16337@bristol.ac.uk> P.Smee@bristol.ac.uk (Paul Smee) writes:
>>Sounds like marketing hype to me.  I could believe that explanation if
>>CDs were made by gluing thin metal foil to the plastic substrate, but
>>that's not how I understand it to work.  My impression is that the
>>metal coating is deposited (an atom at a time) by sputtering or vapor
>>deposit in vacuum, and in that context malleability shouldn't enter
>>into it.
>
>I don't know if your assertion about deposition is correct.
>
>The SEM's I have seen of gold v.s. aluminum metal interconnect
>systems in IC's clearly show that gold has better step coverage.

Could be.  Not my field, and I have been known to be wrong on
occasion. :-)  I'd guess, though, that when you're talking a molecular
or atomic sizes, polycarbonate pressings don't have incredibly sharp
corners anyway.  Certainly wouldn't expect them to be as 'step-py'
as you could get in a silicon IC substrate, for example.  (This is
reasoning from first principles, rather than practical experience, so
if someone knows different, by all means correct me.)

-- 
Paul Smee, Computing Service, University of Bristol, Bristol BS8 1UD, UK
 P.Smee@bristol.ac.uk - ..!uunet!uknet!bsmail!p.smee - Tel +44 272 303132
Newsgroups: rec.audio,su.market
From: trump@leland.Stanford.EDU (Michael Jason Lewis)
Subject: Re: **Stereo Equipment for Sale**
Organization: DSG, Stanford University, CA 94305, USA
Date: Thu, 17 Dec 92 05:12:31 GMT

In article <1992Dec16.163016.983@cmkrnl.com> jeh@cmkrnl.com writes:
>In article <1992Dec16.192459.20454@leland.Stanford.EDU>,
> sugimoto@leland.Stanford.EDU (Edward Sugi Morimoto) writes:
>> I'm not sure if I want to sell this stuff, but if I get reasonable offers
>> I would like to upgrade my system.
>
>In other words, you are interested in getting better equipment, but only if you
>can sell this "lesser stuff" to someone else who thinks better of it than you
>do??
>
HOW DARE YOU!  You...you...BASTARD!  Selling something because you want to 
replace it!  What the hell were you thinking?

You know, Jamie, this is how most people do these things.  

1)  The seller decides that they would rather have money than the goods that
they possess.  In this case, the money would be used to purchase other stereo
equipment.

2)  The seller finds someone who is willing to pay for the goods for sale.

3)  The goods are sold.

I mean, isn't that why anyone buys anything?  Because they think that the stuff
for sale is worth more than the money required to get it, whereas the seller
thinks that the money is worth more than the goods?

C'mon, Jamie.  Get your finger off the trigger.  You're firing a little too
quickly.

- Mike Lewis
trump@leland.stanford.edu
From: znpt01@trc.amoco.com (Norman P. Tracy)
Newsgroups: rec.audio
Subject: Re: Sony CDP-X111ES
Date: 18 Dec 92 14:44:12 GMT
Organization: Amoco Production Company, Tulsa Research
Originator: znpt01@gpss43


In article <1992Dec16.154014.980@cmkrnl.com>, jeh@cmkrnl.com writes:
> In article <6063@rosie.NeXT.COM>, Matt_Watson@NeXT.com writes:
> > Anyone have any experience with this beast?  I need a decent CD player  
> > with optical digital out, and this seems to be a contender...
> 
> I'd look elsewhere.  The stories of problems with Sony CD players, both -ES
> and non-, are legendary.  
> 
> One non-legendary data point:  I have a CDP-208ESD in my office system.  It's
> okay most of the time.  But I have one disc that is scratched in such a way as
> to cause this player to skip.  (The scratch is a sort of a spiral shape,
> neither circular nor radial.)       -----------------------------------

Second non-legendary data point:  I have a CDP-507es which for about 5 years
now has given me excellent sound and reliability.  It just runs and runs and
runs and runs.  This in spite of the fact that I've opened it up and run all
sorts of crazy audiophile mad scientest experments on the poor thing.  It
hasn't seen its stock op-amps in years.

JEH is ready to damn all Sonys because his won't track one esp. difficult
scratched CD. In fact he has two other Sonys that will track the disk in
question!  When it comes to tracking problem disks there are unit to unit
variabilities, do we reject all Sonys because one of JEH's could use a little
more gain in the servo ciricuit?

I would like to advance the notion that the reason you see so many complaints
re. Sony reliability (the stuff of net "legends") is that Sony sells so much
product.  There failure rate % could be lower than a smaller company but
because they sell so many units it translates into a greater number of people
with problems.  And we all know somebody with a bitch is much more likely to
post a slam than somebody who's happy as a clam will post a praise.

Also keep in mind we're discussing a company here whose product range goes
from $9.95 Wallmart headphones to million dollar plus CD mastering factories.
Like any product you have to look at the individual unit and decide for
your self if it has the quality you desire for the price you are willing to
pay.

Norman Tracy
znpt01@trc.amoco.com
Newsgroups: rec.audio
From: drkhoe@nmt.edu (ONID)
Subject: Re: MiniDisc is here!
Organization: New Mexico Tech
Date: Wed, 16 Dec 1992 05:19:02 GMT


Just to clear up some misconceptions:

DCC uses a hash table, just like a disc, to delete a song and replace it, you
don't have to redo the whole tape..


Sure MD and DCC aren't CD's... but can you record on a CD for cheap?
-- 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Computers are bad for you, they cause brain cavities... Even Crest can't help!
"Shouryuken" - Ryu | The piper has lost his way... the mice have ran away!
%%%%%%%%%%%%%%%%%%%%%%%%%%%%---drkhoe@nmt.edu---%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
From: chrisc@gold.gvg.tek.com (Chris Christensen)
Newsgroups: rec.audio
Subject: Re: CD Pro Logic
Date: 11 Dec 92 21:23:45 GMT
Organization: Grass Valley Group, Grass Valley, CA

In article <19973@ucdavis.ucdavis.edu> matthews@eecs.ucdavis.edu 
(Thomas W. Matthews) writes:
>I have a question regarding "Pro Logic" and "Surround Sound".

(Edited description of posters idesa on the decoding of Dobly Stereo
encoded sound).

The term "Pro Logic" is used to give weight to the methods used to
decode the multi-channel sound information of the recorded sound.  The
term also usually indicates steering ligic is used to enhance the
reproduced sound.  The encoded sound is refered to as Lt and Rt or
Left total and Right total.  ("Total" indicates the surround and center
channel information is included).

Some decoders use analog matrices and some use digital methods.  It
all boils down to the fact that the Dolby Stereo recording method has
inputs for Left, Right, Center and Surround.  That's it.

What ever decoding method is used:

The Left(Lt) and Right(Rt) signal is used as is. 
The Center channel signal is derived as a sum of the left and right channels.  
The Sub-woofer output is a band limited copy of the center channel.
The Surround channel is the difference of the Lt and Rt 

As I noted eariler the term Pro Logic usually indicates that steering
logic is used.  The steering logic generally monitors things like the
surround channel activity and when the sould level exceeds a threshold
the level of the surround channel is increased slightly to "enhance"
that effect until it falls below the threshold. 

The above paragraph only describes the operation of the steering logic
as applied to the Surround Channel.

This is a simple explanation of the system as used.  I have made no
attempt to explain all of the permutations.

The term _Dolby Stereo_ is the correct industry standard term to
describe sound that is intentionally recorded with that
characterization......
-- 
Chris Christensen                  The opinions I express are my own,
chrisc@gold.gvg.tek.com            and sometimes they are wrong!
916-478-3419 FAX 916-478-3887      After all, I *AM* only human.
From: ms@hpscit.sc.hp.com (Maurice Smallwood)
Newsgroups: rec.audio
Subject: Re: WANT: Hafler DH-220 power amp modifications.
Date: 17 Dec 92 18:45:03 GMT
Organization: Hewlett-Packard, Santa Clara, CA

I am also interested in these mods. Please include me if email is used to
pass on this information, otherwise I will monitor this notes group.

Maurice
msmallwood@dtc.hp.com
From: tom@afthree.as.arizona.edu (Thomas J. Trebisky)
Newsgroups: rec.audio
Subject: Re: question on pre-amplifiers
Date: 15 Dec 92 19:46:02 GMT
Distribution: usa
Organization: University of Arizona, Tucson, AZ

randyd@csd4.csd.uwm.edu (Randall Elton Ding) writes:
>I experimented with my cd player's variable output, connecting it directly
>to my amps, and found it sounded the same as using my preamp but with
>one problem.  The maximum output voltage of the CD player (full cw)
>was was not great enough to drive my amplifier at max volume.

I have observed the same thing, BUT, I played around a bit with an
oscilloscope.  My CD player will generate a 2V signal (this looks like
2V peak to peak on the scope on loud passages I could find).  This +-1 volt
signal would drive my dyanaco power amp to generate pretty much it's max
swings without clipping (60V peak to peak i.e. +-30 volt swings).

>My preamp is not just a buffer stage but actually a voltage gain 
>stage to supply the necessary current and voltage which my amp
>requires.

See below -- at this point I am unsure what to say about this.

>In my situation, a passive preamp would not work if you want to play music
>at full volume.  You need to check this out before deciding to buy a 
>passive preamp.

I was inclined to agree with this (before I saw your post), but adding gain
to the preamp would be driving my power amp to clip and distort the louder
passages.  These CD's just have a lot of dynamic range.
Admittedly my little satellite speakers are pretty inefficient, this may
be the root of my problem, otherwise, I just need more power, more efficient
speakers, or both.   Comments??
--
	Tom Trebisky	ttrebisky@as.arizona.edu
...."There's no sense in being precise when you don't even
.... know what you're talking about." 
                       - John von Neumann  
Newsgroups: rec.audio
From: cryanrm@cc.curtin.edu.au
Subject: HELP: Altec Drivers - 2nd try
Organization: Curtin University of Technology
Date: Tue, 15 Dec 1992 06:14:40 GMT

In article <1992Dec9.103910.1@cc.curtin.edu.au>, I wrote:
> 
> I have a friend who needs to locate a source of "phenolic diaphram" for :
> 
> 	Altec Lansing Hi Frequency Drivers
> 	
> 	Model 908-8A    or,
> 	      802-8G
> 
> He would like an estimate of the $USA as well as a address of a supplier
> within the USA, preferably one who would be willing to ship some of these 
> things to Australia.
> 
> Please help, HE is the Hi-Fi buff, not me, so if the details and/or spelling
> is a little rough, then have some sympathy for the ignorant.
> 
> If anyone can help with information, or advise which group I should have 
> posted to for this request, then please reply by mail, or post details.
> 
> Thanks in advance for any help.
> 
> Cheers,
> 
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> |  Bob Ryan        Curtin University of Technology        WESTERN AUSTRALIA   |
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> | Internet: Ryan_BM@cc.curtin.edu.au  |    _.-_|\     | Metal : For the ears  |
> | Phone   : +61 9 351 2250            |   /      \    | Amigas: For the mind  |
> |                                     |   \_.--._/    | Eagles: Premiers 1992 |
> |                                     |         v     |                       |
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

As yet I have not received a reply.  
Did I post to the wrong place. Is the information lacking something.
Someone please help out here, just tell me where I might be likely to receive
a reply to the query if you know.  ANY reply would help now.

Bob.
From: ch218@cleveland.Freenet.Edu (Erik A. Horn)
Newsgroups: rec.audio
Subject: Re: Books for the blind gadget?  Help!
Date: 14 Dec 1992 20:24:57 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: hela.ins.cwru.edu


I am familiar with the equipment you mention. 4 track tape recorders.
I have seen them, and I have found that one brand in paticular
(I forget which it is), is having awful problems, so a lot of
people are switching I guess.  Yes they are available 
commercialy, the best bet to found out where to order other  
models would be to call the nearest office that deals with
the visually impaired(most college campuses have one).
Newsgroups: rec.audio
From: mike%jim.uucp@wupost.wustl.edu (Mike S.)
Subject: Re: Any Recommandations for Subwoofer around $300?
Organization: BITS, St. Louis, MO
Date: Mon, 14 Dec 1992 21:24:29 GMT

laufer@math.luc.edu (Konstantin Laufer) writes:

>In article <1992Dec13.105318.12003@noose.ecn.purdue.edu>, leejun@stable.ecn.purdue.edu (Jun H Lee) writes:
>> Could anyone recommand nice subwoofer for around $300?

>I'd be interested, as well.  I have an NAD 7240 receiver and Celestion
>3 speakers.  Thank you,

If you all are talking about powered subs, I believe the only one
that comes close to this price range is the Yamaha 50 model, which
is around $350, I believe.  Their model 100, which is more powerful
and has a lower cutoff, is about $100 more.

Mike
-- 
mike%jim.uucp@wupost.wustl.edu
Newsgroups: rec.audio
From: DPierce@world.std.com (Richard D Pierce)
Subject: Re: Class C amplifiers, says Mr. Pierce.
Organization: The World Public Access UNIX, Brookline, MA
Date: Thu, 17 Dec 1992 03:44:07 GMT

In article <41484@unix.SRI.COM> henry@ginger.sri.com (Henry A. Pasternack) writes:
>
>   In a recent posting, Dick Pierce referred to Class C amplifiers.
>
>   I'm curious to know the brands and model numbers of some of the
>more popular Class C audio amps.
>

I don't know who currently markets class C stuff, but the early Phase
Linear stuff came through biased so damn close to class C that it might as
well have been done that way intentionally. The major reason is that the
heat sink area (which they achieved with but three pieces of 1/8 aluminum
bent into three different U-shaped sizes nested one in the other) was so
small that if you tried to biad the thing to lower the distortion to
something reasonable at low power operation, the thing would fry itself
idling. At the time, the 60 watt per channel Marantz power amp (model 32
or 33, don't remember which) had 50% more heatsink area than the 350 watt
per channel Phase Linear 700.  One of the manifestations of this biasing
schem was that the simple harmonic distortion at rated power was below
.05% easily, but at one watt it was starting to crawl way above 1%, and
most of that was crossover notch artifacts. Real nasty sounding amp at low
power! As I recall, it was one of Bob Carver's more successful early
attempts at a product.

I couldn't imagine anyone conciously peddling crap like that these days
(but I have been surprised before!).
-- 
|                Dick Pierce                |
|    Loudspeaker and Software Consulting    |
| 17 Sartelle Street   Pepperell, MA  01463 |
|       (508) 433-9183 (Voice and FAX)      |
Newsgroups: rec.audio,rec.video
From: mjv8557@eafs000.ca.boeing.com (Mark J. Vandiver)
Subject: Re: long patch cord TV-to-receiver ?
Organization: be41t
Date: Mon, 14 Dec 1992 23:36:50 GMT

telke@bnr.ca (Craig Telke) writes:

>In article <1992Dec10.170629.27858@ns1.cc.lehigh.edu>, dbp0@ns1.cc.lehigh.edu (DENNIS B. PRICE) writes:
>-->
>--> I've got a problem.  Do any of you have a solution/suggestion?
>--> TV must be located approx 35' from my stereo receiver. 

>I have a very similar situation.  I just moved into a new house that has a 
>neat AV cabinet, but it is 35' from where I want to put my TV (50" Pioneer
>rear projection).  What is the best way to do this for both audio and 
>composite video (my TV has S-video, but not my AV receiver (prologic) or 
>VCR (Hi-Fi))?  What type of wire is best to use?  Would I be better using 
>my VCR to remodulate the signal onto standard cable and run it to the TV 
>that way?

>My AV equipment is consumer grade (Sony/Pioneer/Mitsubishi).  

>Thanks,
>-Craig-     telke@bnr.ca


Go down to Magnolia Hi Fi if available and get 3-4 conductor sheilded
wire and high quality RCA jacks. connect all outer RCA connectors to
the sheild and the center RCA pin to the individual wires. This should
reduce any 60Hz hum and video signal noise.

Newsgroups: rec.audio
From: znpt01@trc.amoco.com (Norman P. Tracy)
Subject: Re: question on pre-amplifiers
Originator: znpt01@gpss43
Organization: Amoco Production Company, Tulsa Research
Distribution: usa
Date: Mon, 14 Dec 1992 21:06:35 GMT


In article <1992Dec14.155907.11114@news.acns.nwu.edu>, andrew@casbah.acns.nwu.edu (Andrew Sung Hyun Kim) writes:
> In article <Dec.12.22.35.56.1992.293@geneva.rutgers.edu> hedrick@geneva.rutgers.edu (Charles Hedrick) writes:
> >Several people have commented in the past that it works, but typically
> >quality suffers.  This agrees with my experience.  I have a fairly
> >good quality CD player (Luxman DZ 121, I believe, though I could be
> >off by a digit in the model number).  I was driving a Hafler power amp
> >from it.  I was bothered by a lack of highs.  By inserting a preamp
> >(also Hafler), the highs appeared.  
>                     ^^^^^^^^^^^^^^
> 
> Where did it come from?  Could it be 'high' distortion introduced
> by your preamp?
> 
> Andrew
> 
Andrew,
The $0.05 op-amps used in so many typical CD players have almost no load
driving capability.  Asked to run both a pot (in the player or a "passive
pre-amp") and the amps input impedance (which is not always as high or linear
as it should be) they just run out of current and limit.  Hook up the same
op-amp to a good active pre-amp with its input buffer presenting a nice high
impedance and good things happen.  Like highs appearing, or bass firming
up, or a more 'dynamic' sound.

For example the state-of-the-past NE5535 dual op-amp still used in so many
players (gag) is rated at a supply current of 1.8 mA.  A good high-end op
like the AD811 runs at about 14.5 mA and can drive video signals into a 75
ohm load.  Guess which op-amp will work better with out an active pre-amp
to buffer it from the cold cruel world?

Norman Tracy
znpt01@trc.amoco.com
From: lstein@adobe.com (Larry Stein)
Newsgroups: rec.audio
Subject: FOR SALE: Nakamichi CD Player
Date: 17 Dec 92 17:37:15 GMT
Followup-To: rec.audio
Distribution: ca
Organization: Adobe Systems

**PLEASE DO NOT EMAIL ME -- I AM NOT SELLING THIS EQUIPMENT**

FOR SALE

     Nakamichi CD Player - Model OMS-3A
     3 years old
     in excellent condition

     Price:  $200

Call Carl at (415) 648-2908
Newsgroups: rec.audio
From: goyal@utdallas.edu (MOHIT K GOYAL)
Subject: Looking for opinions on cd changers
Organization: Univ. of Texas at Dallas
Date: Wed, 16 Dec 1992 16:44:55 GMT


Can anyone give me advice on what are some of the better/best 
cd carousels(sp?) available.

I'm interested in ones that let you change cd's without stopping the music.

The only companies that I know make these are Technics, Yamaha, and Denon.

Are their others?

Thanks.

Newsgroups: rec.audio
From: gmw1@cunixa.cc.columbia.edu (Gabe M Wiener)
Subject: Re: CD Sound Quality
Reply-To: gmw1@cunixa.cc.columbia.edu (Gabe M Wiener)
Organization: Columbia University
Distribution: usa
Date: Sat, 19 Dec 1992 17:00:54 GMT

In article <19DEC199208241886@rigel.tamu.edu> mjf9968@rigel.tamu.edu (Pi(3.143832666)) writes:
>>   Although we can definitely engineer a better medium for holding music, I
>>   think we can say we have perfectly satisfied our ears with 44.1kHz x 16bit
>>   data for each channel. Who the hell can tell the difference between 96dB
>[digital babble deletia]
>>   and we definitely can cure jitter by putting the crystal of the DAC system
>>   IN THE DAC box, not in the transport box. The whole jitter scene then
>>   becomes a nonissue.
>
>	Further proof of how one-track-minded people have become
>	about the storage and reproduction of music.

Well, there's a non-statement if I ever saw one.  The previous poster was
spekaing (and speaking quite accurately) about the technical and engineering
problems in improving digital recording media.

>	Obviously yet another "critical listener" who auditioned
>	a $200 CD player versus a $200 phono set-up and decided
>	that digital was inherently better.

Where do you deduce this?

>	PS--  I've been wondering: wouldn't it be possible to
>		have a optical, analog format?  Isn't that
>		effectively what LD's are?  Would such a format
>		give us the best of both worlds: durability,
>		convenience, *and* sound quality?

There is an optical analog machine...the Finial Laser Turntable.  Yours for
$35,000.


--
Gabe Wiener - Columbia Univ.     "This 'telephone' has too many shortcomings 
gmw1@cunixa.cc.columbia.edu       to be seriously considered as a means of 
N2GPZ in ham radio circles        communication. The device is inherently of
72355,1226 on CI$                 no value to us." -Western Union memo, 1877
From: rhoades@ll.mit.edu (Captain Chaos)
Newsgroups: rec.audio
Subject: Re: WHY NOT USE A BIGGER DISK FOR SONY MD?
Date: 18 Dec 92 22:38:27 GMT
Organization: MIT Lincoln Laboratory

One reason is that a 2" disk is a _lot_ smaller than the CD, so it's more
convenient.  If you just want another 5" CD, get one of those CD cartridge
players for the car and put your CDs in cartridges... ;)

The point about making defect-free media in larger sizes is an interesting
one, except that for computers it isn't really an issue.  Most computer
disks have back sections, which are noted and avoided by the operating system
(they are marked during formatting I think).  For music, though, it could
be more of a problem (though the 10 sec buffer could certainly handle a
system of skipping bad blocks).  This idea, then, doesn't explain the high
cost of computer magneto-optical disks, unless it costs a lot to get low-
defect (instead of just no-defect) disks as well.

Andrew
rhoades@ll.mit.edu
From: lstowell@pyrnova.mis.pyramid.com (Lon Stowell)
Newsgroups: rec.audio
Subject: Re: tweaks for cheap speakers
Date: 16 Dec 92 19:08:55 GMT
Reply-To: lstowell@pyrnova.pyramid.com (Lon Stowell)
Organization: Pyramid Technology Corp., Mountain View, CA

In article <12DEC199222565782@rigel.tamu.edu> mjf9968@rigel.tamu.edu (Pi(3.143832666)) writes:
>
>	I wanted better bass response out of my el-cheapo
>Yamaha speakers (model NS-4), so I pushed them back against
>the wall.  (They had been sitting out about 8-10 inches from
>it.)  Voila!  More bass.
>	Now, however, I'm really noticing how "mushy" the
>bass is.  Was the bass always this mushy, and I just didn't
>notice it before?  Or is this another effect of the speakers 
>being closer to the wall?  And most importantly, is there 
>anything I can do to "tighten" up the bass, without losing too 
>much of the response, that will cost very little?  (If I had 
>money I'd just buy some better speakers.)

     Keep moving the speakers around.  Moving a speaker nearer to a
     wall and or corner tends to increase the bass output.  

     Each room will vary, try moving them UP away from the floor a
     bit, etc. etc.   I'm surprised 10" made that much difference
     though.  
Newsgroups: rec.audio