HDTenEightyP/NetNews huggingface dataset:
From: chrisc@gold.gvg.tek.com (Chris Christensen)
Newsgroups: rec.audio
Subject: Re: Acoustic Measurement/Designing Crossovers
Date: 15 Oct 92 00:34:23 GMT
Article-I.D.: gold.5425
Organization: Grass Valley Group, Grass Valley, CA

In article <1992Oct12.103848.1@zodiac.dsto.oz.au> 
st_waldman@zodiac.dsto.oz.au writes:
>> For those interested in acoustic design/measure software you can't leave
>> out LMS for speaker enclosure design,

>Slight correction here. LMS stands for Loudspeaker Measurement System. It
>consists of a frequency programmable sine-wave generator and a tracking
>RMS voltmeter capable of gating the response signal to produce good quality
>measurements in a non-anechoic environment. It also takes impedance
>measurements, quickly and easily. It includes a calibrated microphone.
>LMS specializes in measurements, but does not do any simulations to help
>you design loudspeaker enclosures.

With out a doubt you are totally correct.  And you even mention LEAP
in your next paragraph.

In case you didn't know LEAP is the sister/brother package for LMS
(even though LMS will operate as a stand alone package).  LEAP has
import utilities that work with most/all of the speaker evaluation SW
on the market.

I have LEAP and I am working on convincing myself that I can't live
without LMS.  I have to get over the LRAP purchase,  $895 before I lay
out $995 for the LMS.........The LMS is capable of making all of the
necessary measurements to do the simulations vis LEAP.
-- 
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: smee@bristol.ac.uk (Paul Smee)
Newsgroups: rec.audio
Subject: Re: Very expensive cables
Date: 14 Oct 92 09:13:26 GMT
Reply-To: P.Smee@bristol.ac.uk (Paul Smee)
Organization: University of Bristol

In article <1992Oct13.114152.25877@edscom.demon.co.uk> rpt@edscom.demon.co.uk (Richard Tomlinson) writes:
>I know that a rusty piece of metal near a transmitting aerial can cause
>interference to nearby receivers. This happens because the rust acts like a
>semiconductor diode causing non-linearities that produce harmonics. If a
>length of cable carrying an audio signal contains impurities then maybe it
>effectively contains diodes that may cause distortion. Presumably, the
>manufacturers believe that oxygen free copper and crystalline structures
>avoid these effects.

Umm, well, the *manufacturers* DO tend to claim that.  Engineeringly,
you can show that these effects should be small enough to get lost in
the 'noise', at audio frequencies.  I.e., for example, the intrinsic
non-linearities in ANY existing set of speakers far outweigh the wire
effects.

This is one of my favourite claims, though, because it's also one of
the arguments used to support the idea of cables being 'directional'.
If you think about it, though, you'll realise that the audio signal is
AC, so that no matter which way around these hypothetical 'diodes' are
pointing, it'll be the wrong direction half the time.

Now, I've got a foot in both camps here.  I do believe I can hear
differences due to cables.  On the other hand, I find the engineering
arguments against all of the popular explanations to be quite
convincing.  So, either there is some as yet totally undiscovered
effect which applies, or it's psychoacoustics and I'm fooling myself.
Doesn't matter to 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
From: smee@bristol.ac.uk (Paul Smee)
Newsgroups: rec.audio
Subject: Re: Herman/Kardon CD player
Date: 16 Oct 92 09:19:11 GMT
Reply-To: P.Smee@bristol.ac.uk (Paul Smee)
Organization: University of Bristol

In article <1992Oct15.012835.19727@fs7.ece.cmu.edu> rajesh@maruti.ece.cmu.edu (Rajesh H. Zele) writes:
>	I bought a "herman/kardon" CD player Model no. HD7400
>from Appliance store. It was on sale (Display Model). The salesperson
>quite convinced me that it was used very little. It looked really new,
>no scratches etc. The original price of this player was $299. Since it 
>was a display model, I got it for $149. I am just begining to be an 
>audiophile and know that Herman/kardon is kinda higher end product.
>
>	After I got it home, I found out that this model was manufactured
>in August 1989. This really scared me. I looked up the specs for HD7400. 
>( sampling freq = 176.4KHz, THD = 0.008 %, Dynamic Range = 96 dB, SNR = 100dB,
>Channel seperation= 88dB). I compared these specs with the most recent SONY
>CD players and found out that SONY (CDP-397) performs rather better with a 
>lot more functionality (like shuffle, better display).
>
>	I would really appreciate, if I could get opinions from experienced
>ears on the NET. What should I do? Return HD7400 or keep it?

Well, first off, don't worry about the specs.  The HK is already good
enough that improvements in the specs won't make a difference in any
reliable way.  (There may be differences, but the specs won't help you
spot them or predict which way the differences will go.)

Now, if you're going to buy your audio stuff by going into an appliance
store and asking what they want to sell you, then keep the HK.  The
odds are pretty good that it will actually sound better than the Sony,
despite whatever the specs might look like.

On the other hand, if you want to get SERIOUS about buying your audio
stuff, then the only sensible answer is that you have to arrange
somewhere where you, yourself, can listen to the various boxes BEFORE
you buy them (which probably means finding a real hifi shop) and then
get whichever one you like best.  If that idea doesn't appeal to you in
your current position, then certainly keep the HK.

-- 
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
From: erich.lim@cutting.hou.tx.us (Erich Lim) 
Newsgroups: rec.audio
Subject: MAIL ORDER FOR NAKAMICHI?
Date: 14 Oct 92 23:46:00 GMT
Distribution: world
Organization: The Cutting Edge - Houston, TX - 713-466-1525
Reply-To: erich.lim@cutting.hou.tx.us (Erich Lim) 

-> Hi!  This is probably a tired question, but can anyone tell me of a
-> good mail-order place for Nakamichi equipment?
-> (Particularly their tape drives?)

  As far as mail-order goes, I don't know of any AUTHORIZED mail order
places that will sell you a Nak for less than $20 or so from the retail
price at your local Nak dealer.  Many places DO sell gray market crap
and stuff UNAUTHORIZED so you get stuck out from the warranty.  If
planning on buying anthing esoteric like Nakamichi, you should probably
buy it from an authorized dealer.  If your Nakamichi happends to break
down, you'll want the warranty since they are quite expensive to repair.


Erich Lim
erich.lim@cutting.hou.tx.us
From: sbhattac@rnd.GBA.NYU.EDU (Shankar Bhattacharyya)
Newsgroups: rec.audio
Subject: Re: Speaker building question
Keywords: speaker building
Date: 15 Oct 92 02:44:50 GMT
Organization: NYU Stern School of Business

In article <5393@gold.gvg.tek.com> chrisc@gold.gvg.tek.com (Chris Christensen) writes:

>In running various cabinet volumes with specific speakers on LEAP I
>have found that small variations in cabinet volume are not critical as
>long as the box is "big" enough to start.

All things considered, excellent advice. If your box is too big, throw in a
couple of books to reduce effective internal volume. If your box is too
small, you are in a lot more trouble.

However, keep in mind that the selection of books matters to the sound.
Thurber produces a whimsical sound. Schopenauer produces a dark and
somewhat depressing sound. Calculus books produce a somewhat overly
analytical sound, which can, however, be ameliorated by using tube
electronics, or by including a couple of lush, romantic books of the
Silhouette variety.

Always use hardbound books. Paperbacks sound cheap.

- Shankar
Newsgroups: rec.audio
From: ssyun@iso.ma.utexas.edu (Sung S. Yun)
Subject: help
Summary: help
Keywords: help
Organization: University of Texas at Austin Mathematics
Distribution: rec
Date: Fri, 9 Oct 1992 19:26:19 GMT

.


-- 

SungSik Yun---UT austin:Mathematics ||| E-mail:ssyun@math.utexas.edu
ph:(512)471-1242 (office)           |||        ssyun@cs.utexas.edu
Newsgroups: rec.audio
From: kludge@grissom.larc.nasa.gov (Scott Dorsey)
Subject: Looking for Audio-Technica shotguns
Originator: kludge@grissom.larc.nasa.gov
Organization: NASA Langley Research Center and Reptile Farm
Date: Tue, 13 Oct 1992 18:45:24 GMT

   I am looking for an Audio-Technica AT 9300 short shotgun mike; these were
fairly cheap consumer microphones intended for home video use in the mid
eighties, and are no longer manufactured.  I have a pair which was highly
modified and the interference tube on one of them is damaged.  If you have
one out there, I would be willing to trade you a better mike or pay a 
reasonable sum for the beast.
--scott

Newsgroups: rec.audio,rec.video,misc.consumers
From: chrisp@theory.TC.Cornell.EDU (Chris Pelkie)
Subject: Re: Problems dealing with this mail order outfit
Keywords:  Electronic Wholesalers, Mitsubishi U57 VCR 
Organization: Cornell Theory Center
Distribution: usa
Date: Thu, 8 Oct 1992 11:51:34 GMT

In article <1992Oct6.171954.12696@tc.cornell.edu>, chrisp@theory.TC.Cornell.EDU (Chris Pelkie) writes:
|> In article <1992Oct5.071317.25768@mnemosyne.cs.du.edu>, dpunjabi@nyx.cs.du.edu (DINESH PUNJABI) writes:
|> |> I recently purchased a Mitsubishi U57 VCR from Electronic Wholesalers,
|> |> a New Jersey based mail order company. I was quoted $89 for a 5-year extended
|> |> warranty on the unit by the salesperson.  I bought the extended warranty 
|> |> on the unit but when I received the sales invoice it read 3-year warranty for
|> |> $89 instead of 5-years. 
|> |> 
|> 
|> 
|> |> Rgds
|> |> 
|> |> Dinesh
|> |> 
|> |> --
|> |> 
|> |> Dinesh Punjabi 
|> |> dpunjabi@nyx.cs.du.edu                Work: (303)-595-2901
|> 
|> Consumer Reports determined a couple years ago that extended warranties
|> were darn close to the biggest scam going. Generally speaking, electronics
|> gizmos break on warranty or not til they are real old, and you probably
|> want the new thingee anyway. Save your money. Look for a consumer
|> product with no less than a one-year warranty and buy it (make
|> sure it's USA warranty if that's where you plan to have it fixed).
|> The extended warranties are rarely needed, and represent a 
|> juicy pot of extra money for the dealers who sell them.
|> 
|> In fact, has anyone ever got a dealer to honor one? What
|> were your experiences? Was it worth buying?
|> I can "trust" Consumer Reports without having
|> to believe they know everything.
|> -- 
|> Chris Pelkie
|> Scientific Visualization Producer
|> Cornell Theory Center
|> Ithaca, NY 14853-3801
|> chrisp@tc.cornell.edu

Following up to myself again. I received two email responses from people who had
success with extended service warranties. One was issued and honored by Circuit
City, who outright replaced a Technics Discman that had been battered around;
the other reports that his VCR died one month after the mnftrs warranty
expired, and Best Buy (not sure: is this an electronics chain in Texas?) honored
the repair for him.

So, on the basis of these two, I would say, know your insurer. Looks like the
warranties issued by reputable electronics chains may not be as bad
as those suspicious looking diplomas you get from the mail order houses.
-- 
Chris Pelkie
Scientific Visualization Producer
Cornell Theory Center
Ithaca, NY 14853-3801
chrisp@tc.cornell.edu
Newsgroups: rec.audio,rec.video,misc.consumers
From: berger@atropa (Mike Berger)
Subject: Re: Problems dealing with this mail order outfit
Organization: University of Illinois at Urbana
Distribution: usa
Date: Tue, 13 Oct 1992 17:07:58 GMT

forman@ide.com (Bonnie Forman) writes:
>  by Sony, I probably would have had to send it back to them
>  to get a new one, or maybe even see about getting it fixed
>  first.  That would have taken weeks, or maybe months.  I use
>  this walkman for my business and cannot be without it.

>  The extended warranty said immediate replacement, which was
>  was extremely important to me.  Also, while the clock was
>  not set back, the remainder of time left on the warranty
>  ( a little over a year) now covers the new walkman.
*----
Ok, so you paid for faster service and not for an extended warranty.
It still doesn't sound like you got much for your money.  It is a
fallacy that every failed item has to go back to the factory.  I've
gotten local service on warranted Sony items (even on one purchased
mail order) in days.  Maybe you should try shopping at a store with a
service department.
--
	Mike Berger
	Department of Statistics, University of Illinois
	AT&TNET     217-244-6067
	Internet    berger@atropa.stat.uiuc.edu
From: hhtra@usho21.hou281.chevron.com (T.M.Haddock)
Newsgroups: rec.audio
Subject: Re: Green Markers?
Date: 8 Oct 92 17:51:42 GMT
Organization: Chevron

In article <1992Oct8.153128.6197@alf.uib.no>, resou@darcy.mi.uib.no (Odd Arild Urtveit) writes:
|> In article <1992Oct7.152655@usho21.hou281.chevron.com>, hhtra@usho21.hou281.chevron.com (T.M.Haddock) writes:
|> > 
|> >   What's this about "green markers" and CD's?
|> > 
|> >   Okay, I'm a audio net newbie.
|> > 
|> >   I don't want to rehash something that sound's like it 
|> >   has be done to death.
|> > 
|> >   Could someone just reply/email a posted summary or ...?
|> > 
|> >   Thanks in advance.
|> > 
|> >   TRAVIS
|> >   hhtra@hou281.chevron.com
|> 
|> Read my article in rec.music.cd 'How to clean/fix/improve CDs'.
|> It's article #20631.  There I also tell a bit about 'CD Stoplight',
|> one of those 'green markers'.  Someone will surely tell you that 
|> they don't work, but make up your own mind.  Try it.  It
|> can make wonders to some CDs.

  Say, you're not the guy that uses Armor-All on his CDs are you?

  Someone has already warned me about you!  ;)

  Joking aside...

  Thanks Odd, I'll check it out.
From: wjin@cs.uh.edu (W. Woody Jin)
Subject: Re: Speaker recommendation ($1500/pair)
Organization: University of Houston
Date: Sat, 10 Oct 1992 05:45:51 GMT

In article <gep2BA200WBK41HlIE@andrew.cmu.edu> Bambang Suryanto <bs3f+@andrew.cmu.edu> writes:
>>BUT beware of these speakers !
>>You must have a relatively big room and an expensive amplifier (i.e. high
>>current, ex. Aragon 4004 II).
>
>I agree that that you really need a big room for it ( and a perfect one
>) but I don't agree that you need an expensive amp. I try the apogee
>with the NAD and it sounded like a million. Well I never try with aragon
>4004 II but I think you can use a not so expensive amp.

Try Apogee dealers.  They all set up Apogees with Aragon 4004 II or
Krell.
In fact, I am using a cheap receiver, and it still sounds good for
Baroque chamber musics. Cembalo Solos sound sound like a real cembalo.
The problem is that as the number of instruments grows (esp for orchestral
musics), it does not sound good.  Bass is unreasonably weak.
I would like to hear about the Centaurs sound from other (relatively cheap)
amplifiers.  Does NAD make good bass from Centaur ?  Does it dissipate
too much heat ?

As Dan previously noted, the sweet spot is too small.  First, you should
make a good sweet spot, by rearranging your furniture (in my case, I removed
all the furniture b/w the speakers).  And then you should be in the
exact sweet spot.  The size of the sweet spot barely fits for two people.
Then the speakers sound amazing.  If you are out of the sweet spot, it sounds
like a cheap portable cassette player.
In my case, I don't concentrate on music when I need to stand up and
walk around.  So, it doesn't matter to me, but if you want to enjoy music
while moving around,  Centaurs are out of choice.

I would like to know the difference that the stands make.  How does it
affect in case of Centaur ?   Is it really necessary ?


-- 
____   ____  ____ ____________________________________ (___) _________________
|  |   |  |  |  |  W. Woody Jin (wjin@cs.uh.edu)       (o o)      Moo.... 
|  |   |  |__|  |  PhD Student. Research Asst.  o=======\ /  I'm  a Cow Lover.
|  |   |        |  Dept. of Computer Science   / |     ||O   My wife  was born
\  |---|  |--|  |  University of Houston      `  ||'---||    in Cow year. Mooo
 \____/|__|  |__| _______________________________^^    ^^_____________________

Newsgroups: rec.audio
From: v035550@stortek.com (Steve Monroe)
Subject: thanks for B&O input, buying something else
Originator: v035550@stcvax
Organization: Storage Technology Corp.  Louisville, CO
Date: Mon, 12 Oct 1992 18:49:31 GMT

Many thanks to all that answered my questions regarding
Bang & Olufsen equipment.  I decided to bow out of the
deal since it seemed that the seller wanted an amount 
that was too close to "new" price.

BTW, I have decided to buy an old McIntosh preamp/amp...

sjm
-- 
"No criticism anyone can give me can even begin to compare with
 what I put myself through 24 hours a day."  - Pat Metheny
From: n8846069@henson.cc.wwu.edu (BarryB)
Newsgroups: rec.audio
Subject: Re: Audio Test CDs - Worth the money ?
Date: 10 Oct 92 01:40:04 GMT
Article-I.D.: henson.1992Oct10.014004.8153
Organization: Western Washington University

monitn@vccsouth27.its.rpi.edu (Nicholas Monitto) writes:

>Another good investment are the test CDs from Stereophile magazine. I got the
>first one when I subscribed and haven't gotten around to ordering the second 
>one yet. Each near or less than $10 with S&H. The first disk includes:

When I orginally subscribed to Stereophile about a year ago
I did so with one of those cards that said I'd get the test
CD for free.  Well, it's been a year and still no test CD.
The same thing happened to one of my friends.  Anyone else
have the same problem?  Is there an easy way to get them
to send the CD?  It hardily seems worth it to waste hours
on the phone and writting letters just to get a $10 CD.
Kinda pisses me off that they don't follow through on
what they promised.

-BarryB
From: gt7257c@prism.gatech.EDU (Jose R. Perez)
Newsgroups: rec.audio
Subject: Portable CD+radio ;was (Re: Good portable Disc players?)
Date: 10 Oct 92 18:34:10 GMT
Organization: Georgia Institute of Technology

In <26178@oasys.dt.navy.mil> goldberg@oasys.dt.navy.mil (Mark Goldberg) writes:

>[Deleted elaboration of skipping problem with other portable.]

>My personal recommendation is for the Car Discman.  I own the Sony D-802.

    Since my walkman went on the fritz, I've been looking for a good portable
CD player, preferibly with a radio. Requirements: Must be good with skipping,
although not great, since I will probably only use it while walking to class
or studying. Must cost less than $200 (or maybe a little more). Must be
reliable, dependable, and more importantly, must last more than 3 years.
It would also prefer one with good battery usage, or at least rechargeables 
that don't die in three months.

    I have looked at the D-802, and fits all these requirements, but has no 
radio. Anyone know of an alternate model?

Thanks in advance,
-- 
*Jose R. Perez           |" Really??" - Dr. Joel Fleishmann                   *
*Internet:               |-- " Cough it up, fuzzball." - H.S.                 *
*gt7257c@prism.gatech.edu|--                                                  *
**********************"There can be only one!"- Conner McLeod *****************
Newsgroups: rec.audio
From: kjt001@dunix.drake.edu (Devil Bunny!)
Subject: Help!  My CD player is having trouble tracking!
Organization: Drake University, Des Moines, Iowa, USA
Date: Fri, 9 Oct 1992 15:36:50 GMT

Recently, my CD player isn't tracking as well.  It seems to have the
most problem with the first one or two tracks on the disc, but is fine
after that.


Will cleaning the player solve this problem?  How much does it cost to
clean it?
Any other solutions?

-kevin

-- 
___________________________________________________________________________
|                        Kevin Tieskoetter                                |
|   kjt001@acad.drake.edu                     kjt001@dunix.drake.edu      |
|                               Drake University                          |
Newsgroups: rec.audio,rec.video,misc.consumers
From: dpunjabi@nyx.cs.du.edu (DINESH PUNJABI)
Subject: Avoid "ELECTRONIC WHOLESALERS" mail order place
Organization: Nyx, Public Access Unix @ U. of Denver Math/CS dept.
Distribution: usa
Date: Fri, 9 Oct 92 02:32:49 GMT

This a follow-up to my previous article about trying to resolve problems
with Electronic Wholesalers ....

I bought a Mitsubishi U57 VCR + 5-year extended warranty.
I was quoted $486+89 for VCR + warranty. When the unit arrived, the warranty
only read 3-years. I called the salesguy who asked me to send the original
extended warranty contract and a SELF-ADDRESSED envelope  ... 

The salesguy hand-corrected the warranty to read 60 months instead of 36 months
without putting any initials ( I would have liked a new contract ). In fact, he
lied that he had written up a new contract .... I could clearly see the 
handwritten changes ... I tried to resolve this problem in good faith, but, the
slaesguy began sounding rude and angry ...After my threatening to return the
unit, he agreed to send me an ORIGINAL invoice showing the purchase of the
5-year warranty ...

I received the new invoice, but it was a photocopy ... I could not even read my
name and address on it ... Now, I intend to complain to the local DA, BBB,
Video and Stereo Review Magazine and Mastercard ... Surely, I intend to return
the unit and get a full refund on it ...

If ou have any comments, please EMAIL them to me ... The unit is OK but the
BIGGEST problem is that I'm not comfortable with their gimmicks ...

Dinesh
--

Dinesh Punjabi 
dpunjabi@nyx.cs.du.edu                Work: (303)-595-2901
From: bruce@ssc-vax.boeing.com (Bruce Stock)
Newsgroups: rec.audio
Subject: Interesting Speaker Question (to me, at least)
Keywords: Interference
Date: 9 Oct 92 22:59:03 GMT
Organization: Boeing Defense and Space Group, Seattle WA


I have been puzzling without success over the situation described below,
so it is time to expose my ignorance and ask the net for illumination:

Eons ago in freshman physics I remember there was a textbook example of
wave interference.  It involved a pair of slits which intercepted a
wavefront, thereby producing an interference pattern at a downstream
plane, so long as the width of each slit was reasonably less than the
wavelength.  (I'm sure you all remember this, so I won't include the
tortured ascii graphics)

It occurred to me that this phenomenon could also appear in the
soundfield of any stereo speaker system, if certain conditions prevail.
For example,  when a sustained note appears at frequency where the
speakers act as a point, or line, source.  Yet, I have seen no
discussion of this effect in the popular audio literature.  So I assume
that there must be real world considerations which render the ideal
situation inaudible.  For example, real instruments do not often produce
a single frequency, so the effects might not be that obvious.  And of
course real living rooms have floor, ceiling, backwall, and sidewall
reflections to contribute (unless near-field listening is used?).

On my own speakers (Dahlquist DQ-8's) I do hear something when I put on
intercarrier hiss (poor man's white noise), and move my head from side
to side about the midpoint.  It isn't the classic interference pattern
that I would expect, but more like a weak sin(x)/x amplitude variation.

So how about it gentlemen - why is this effect not the kiss of death for
detailed, yet stable imaging?

Regards, Bruce Stock
Newsgroups: rec.audio