HDTenEightyP/NetNews huggingface dataset:
From: fox@cs.nyu.edu (David Fox)
Newsgroups: rec.audio
Subject: Oops, I mean Stereo Exchange (was Re: Also try Stereo Warehouse)
Date: 18 Aug 92 17:28:13 GMT
	<1992Aug12.023026.5914@udel.edu> <4679@blue.cis.pitt.edu.UUCP>
	<FOX.92Aug13041710@graphics.nyu.edu>
	<FOX.92Aug15140803@graphics.nyu.edu>
Distribution: na
Organization: Courant Institute of Mathematical Sciences

I got the store name wrong, it is actually Stereo Exchange.  I just
spoke to Peter, and he says they will sell by mail order.  Their
number is 212-505-1111.  They sell Adcom, NAD, Yamaha, and I've seen
lots of nice speakers there.  I think there prices are below list, but
I don't know how far.  I have no affiliation, except as an occasional
customer.
From: gt6363a@prism.gatech.EDU (John Hoang)
Newsgroups: rec.audio
Subject: Question about Hughes Sound Retrieval
Date: 20 Aug 92 21:59:01 GMT
Organization: Georgia Institute of Technology

Has anyone on the net listened to or own the Hughes Sound Retrieval component? 
(The model number of their unit is AK-100, I think.)  How does it compare to 
Yamaha's DSP surround sound processors (e.g. DSP-100U) in achieving realism? 

Thanks for any inputs.
-- 
gt6363a@prism.gatech.edu 
Newsgroups: rec.audio
From: sethb@fid.morgan.com (Seth Breidbart)
Subject: Re: Sony's SBM CD Mastering
Organization: my opinions only
Date: Fri, 14 Aug 1992 22:42:27 GMT

In article <1352@eouk9.eoe.co.uk> ahaley@eoe.co.uk (Andrew Haley) writes:
>mbk@poincare.ucsd.edu (Matt Kennel) writes:
>: dplatt@ntg.com (Dave Platt) writes:

>: : Well, it was _recorded_ with 20-bit technology, _mastered_ and
>: : _reproduced_ with 16-bit technology, and the 20->16 conversion wasn't
>: : a simple roundoff or truncation.
>
>A simple roundoff (with 1/2 bit dither to linearize the quantization)
>is the right thing to do in this case.

Simple roundoff with dither is a good thing to do; I see no reason to
believe it's the best.  Why do you think 1/2 bit (uniform?) dither is
best?  I've heard that 1 bit (triangular) dither is better.

It seems obvious to me that intelligent processing must be better than
random dither:  Of all the possible 16-bit conversions, pick the one
that is closest to the 20-bit (in some appropriate vector space).
This is computationally intractable, but there are obviously
heuristics that help.

Seth		sethb@fid.morgan.com
From: myers@hpfcso.FC.HP.COM (Bob Myers)
Date: Thu, 13 Aug 1992 20:10:20 GMT
Subject: Re: class D power amp
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: rec.audio



Snell Type Q loudspeakers with stands and cables  $600

Tube Traps for room accoustics $300

1 meter pair of MIT interconnects $80

E-mail or call 408 225 0923

Newsgroups: rec.audio
From: lancer@wpi.WPI.EDU (Stephe Lewis Foskett)
Subject: Re: 4 Sale - Receiver Parts?
Organization: Worcester Polytechnic Institute, Worcester, MA 01609-2280
Date: Fri, 14 Aug 1992 22:28:08 GMT


I have for sale a receiver with a broken amp and working tuner.  Hmmmm...
anyone out there feel industrious?  Here's the scoop on mine:

                                                                               
Stereo:
Fisher amp (240 watts, one amp IC blown), separate receiver (LED, quartz
tuning, works very well), and dual casette deck.  These will only work
together, unless someone wants to build a strange power supply for the
radio and casette deck.  I would like to get rid of all three components,
though.  This all worked beautifully until Worcester served me up a huge
power spike and toasted the amp.  I'll take the best reasonable offer.


.s.
--
- so spake lancer@wpi.wpi.edu -          - The Kids in the Hall: -
-  And in France they speak French because they think it's cool  -
-                It gives them an excuse to smoke                -
Newsgroups: rec.audio
From: keith@cco.caltech.edu (Keith Allan Schneider)
Subject: Headphones and Mail Order Help Needed
Organization: California Institute of Technology, Pasadena
Date: Sat, 15 Aug 1992 23:47:21 GMT

I am in the markey for a top quality set of headphones.  The Beyer headphones
have been recommended, but no store aroud seems to carry them.  Anyway, does
anyone know where I can get ahold of a mail order audio catalog?

keith

Xref: sparky rec.audio:11571 sci.electronics:14429
From: mccrate@netcom.com (Joe McCrate)
Subject: Re: PSB Stratus Gold speakers
Date: Fri, 21 Aug 92 07:29:23 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 

ted@dgbt.doc.ca (Ted Grusec) writes:

>What's klutzy about a straightforward, no-nonsense medium-tall cube?

What's klutzy is the thick, thick slab of solid oak on top overhanging
the rest of the cabinet, the plastic o-ring where the top meets the
cabinet, and the metal-trimmed cabinet edges.

I wish they would save the money spent on the thick slab slapped
on top, and put a few bucks into edge joinery.

However, even if they have a klutz as a cabinet designer, the speakers
sound like they were designed by Mozart.  And even the cabinet is OK if
you don't focus on it.  There's nothing wrong with its proportions.
From: davea@hpscit.sc.hp.com (Dave Angelini)
Date: Wed, 12 Aug 1992 15:00:34 GMT
Subject: Audio Gear FOR SALE
Organization: Hewlett-Packard, Santa Clara, CA
Newsgroups: rec.audio

         
New York Audio Labs Minuet in A preamp. Tube/Mosfet, Hi gain Phono,
Excellent CD line stage. Will drive any amp properly.   $275

Tube Traps for room accoustics. Two corner sets of two each. Two
side wall sets.  $250

Snell Type Q Mini monitors with stands and monster cables. $ 600

MIT 1 meter line cable $ 90

E-MAIL or call 408 225 0923
From: kevin@ucrmath.ucr.edu (peter kevin lund)
Newsgroups: rec.audio
Subject: CD Length (again....)
Date: 15 Aug 92 23:29:02 GMT
Organization: University of California, Riverside

Well, in a way I'm sorry to bring this back up, but perhaps somebody will
be interested...

I spoke to a gentleman recently (who asked that he remain nameless due to
an unexpired nondisclosure agreement, yeah I know this sounds shady
already, but it is true), who has been intimately involved with CD
production.  A company he used to work for produced, commercially, a CD
with 84 minutes of music on it; he couldn't remember the title offhand
but it's evidently some dutch organ competition, or something like that.

The company was threatened by Phillips to have their license revoked,
but nothing happened because the disc was just on the edge of being in
spec.  Later they were going to do an 85 minute one, and I guess Phillips
put their foot down on that one.

A side note - just for laughs (I guess...maybe it was Science?), they
cut a disc with 1/2 normal track pitch (tracks twice as close as the
spec says); I guess this would put 2 1/2 - 3 hours of music on the disc.
About a quarter of the commercial mechanisms they tested could read it...

So there you have it.  If need be, I can probably find out some more
info on the 84 minute disc...

    Kevin Lund (kevin@ucrmath.ucr.edu)
From: ebe+@pitt.edu (Elmer Beachley)
Newsgroups: rec.audio
Subject: Re: Subwoofers
Keywords: subwoofer
Date: 13 Aug 92 01:58:56 GMT
Distribution: usa
Organization: University of Pittsburgh


Newsgroups: rec.audio
Subject: Re: Subwoofers
Summary: 
Expires: 
Followup-To: 
Distribution: usa
Organization: University of Pittsburgh
Keywords: subwoofer


WRT finding Velodyne at a discount, I posted a similar request a while
back and got zip.  My wife called their main office 408-436-7270 and
got a list of dealers in our area (Pittsburgh).  All wanted list price.
She called back and got even more dealers.  One in Virginia Beach, VA.
was finally willing to discount, but I think maybe only 10%.  Sorry,
but I can't find the dealer's name or phone right now.  We ended up
ordering from this dealer, and he had the unit we wanted in stock and
shipped promptly.  It works and we are quite pleased.  In case you're
an electrical type, Velodyne does not give out schematics.  Repair is
only by their authorized service centers (in case that would affect
your purchasing decision.)

Hope this helps,

Elmer Beachley ebe@unix.cis.pitt.edu
From: DPierce@world.std.com (Richard d Pierce)
Newsgroups: rec.audio
Subject: Re: Math problem - pitch control
Date: 21 Aug 92 15:34:35 GMT
Organization: The World Public Access UNIX, Brookline, MA

In article <1992Aug21.131023.26104@meiko.com> simont@meiko.com (Simon Turner) writes:
>
>I believe it's just under +/- 2.  Semitone spacing (in the equal-tempered
> scale) is defined as the 13th root of two or approx. 1.054766.
>
>Two semitones are thus 1.112531 apart, or 11.25%
>

Yo, Simon, I don't know what musical scale your talking about, but the one
that sits on my keyboards and resides thoroughly entrenched in my theory
books on tuning says that there are 12 intervals (or semitones) per octave,
not thirteen, and in an equally tempered scale each semitone is thus 1/12
of an octave:

        C<->C#<->D<->Eb<->F<->F#<->G<->G#<->A<->Bb<->B<->C

suggesting very strongly that an equally tempered semitone is the 12th
root of two, or roughly 1.059463094. Two semitones span a ratio thus of
1.189207115 (I will concede that while I am VERY good at tuning a
harpsichord, I probably don't worry beyond the 4th decimal place).

An equally tempered 5th, which encompasses 7 semitones, in your scheme would
have a ratio of 1.45242, under a 12 semitone octave would have a ratio of
1.49831, which is very close to 1.5, or a ratio of 3:2. Equally tempered 5ths
are very close to pure.

-- 
|                Dick Pierce                |
|    Loudspeaker and Software Consulting    |
| 17 Sartelle Street   Pepperell, MA  01463 |
|       (508) 433-9183 (Voice and FAX)      |
Newsgroups: rec.audio
From: mrbill@leland.Stanford.EDU (William Bowen)
Subject: Re: strong desire to vibrate room
Organization: DSG, Stanford University, CA 94305, USA
Date: Fri, 21 Aug 92 20:08:24 GMT

In article <1992Aug18.020543.2917@csdvax.csd.unsw.edu.au> 85p8379@csdvax.csd.unsw.edu.au writes:
>Hello, I'm a bit confused about connecting a sub-woofer to my amp.  I have an
>NAD 7225 PE rig with two sets of stereo speaker jacks at the back.  A pair of 6
>ohm NAD 8225's is connected to Speaker A jacks, and I want to connect the
>sub-woofer to Speaker B jacks.  The sub-woofer will be a home-made mono
>12" job, and I plan to incorporate a filter to reject anything above 100 Hz.
>Sound reasonable ?  Reasonable sound ?  QUESTION:  How do i feed the stereo
>signal into a mono speaker ?

You should buy a subwoofer driver with dual voice coils. Hook each channel of
your amp to its own voice coil.

>One guy told me to just tie left and right
>outputs of Spkr B together, I somehow don't think this is a good idea, coz it 
>will no doubt short out the stereo signal coming out of Spkr A as well !?

DO NOT DO THIS! This arrangement will undoubtedly damage your amplifier. The
two channels will each be trying to drive the other. This is bad.
 
>Others have suggested I use a difference signal, i.e. + of left and + of right
>connected to sub-woofer, leave earths out of circuit.  Someone said this is
>risky.

This isn't very risky, but it won't work very well for a subwoofer application
because most recordings have their bass mixed mono, or close to it, so that
(among other reasons) both woofers of a conventional stereo pair can
contribute to the bass output. Since there's little difference between the
left and right channels in the bass region, you won't hear anything from your
subwoofer using this scheme.

>Why ?  Short ?  Bang ?  Also, does sub-woofer impedance have to be
>matched roughly to that of the 8225's ?

A rough match is a good idea and easy to achieve.

>Does a choke filter present its own impedance load ?

Yes. Its impedance increases with frequency. But you don't need to worry about
it.

>(No, I'm NOT
>an electrical engineer :-)  !)  Anybody who can
>make any sense of this post is one up on me.  Thanks for reading it,

Hope this helps.

Bill
mrbill@leland.stanford.edu
From: CCEB001@UTXVM.CC.UTEXAS.EDU
Newsgroups: rec.audio
Subject: temperatures and component life
Date: 17 Aug 92 16:55:10 GMT
Article-I.D.: UTXVM.16846998E.CCEB001
Organization: The University of Texas at Austin

In article <133141@lll-winken.LLNL.GOV> turner@rastaman.llnl.gov (David Turner)  writes:
>My new amp lives on the top shelf of my stereo cabinet, which is an old wooden
>armoire.  I noticed that it was getting quite warm up there, so I rigged up a
>hanging thermometer above the amp.  On a hot day, with loud music playing, I
>saw temperatures above 100 degrees F., actually around 110.  I know this is
>warmer than I would like, and I plan on adding a fan and more vents to the
>cabinet.  But it made me wonder:  How warm is too warm?  How much damage am I
>doing to my amp by having it bathed in 110 ambient degrees?  I would be inter-
>ested in seeing a discussion of heat and its effects on stereo components.
 
I have a similar setup in my home.  I solved the problem by using separate
preamp and power amps.  The power amp lives on top of the amoire hidden by
a bit of crown molding etc.  It gets to sit in nice cool room temp air stirred
up by the a/c and ceiling fan.
 
The preamp only draws about 15 watts and so generates very little heat.  If
you check the ratings on the back, you will find that tuners and cd players
are similar power misers.  Turntables and Casstte decks use more power but
not much more and will be happy enough in a closed amoire, if you do not
try to run them all at once.
 
A power amp, integrated amp, or receiver isout of the question because the
power amp section can get real hot.  All audio components show their power
consumption on the back.  You may assume that all watts eventually become
heat.  You can (I have) even get by with minimalist tube gear such as the
old Dyna preamps.  Just check the power rating before you put it in and do
not feel compelled to run it all at once.  It is really hard to find a
midfi power amp and preamp and it costs more than a receiver but it can
be done.  NAD and and Adcom are good choices for this application.
 
A rig like this definitly increases the spouse acceptance factor which is an
important performance metric.  Most amoires have removable backs which make
installing and removing componenets less painful.  They really cuts down the
dust in your gear too.  An antique pie safe with punched metal sides would
probably stay cool with power amps inside and maintain the saf.  :-)   Amoires
and pie safes large enough for audio components are hard to find.  :-(
 
Mike.Coyne@utxvm.cc.utexas.edu
From: j_adams@hpfcbig.SDE.HP.COM (John Adams)
Date: Fri, 21 Aug 1992 14:53:05 GMT
Subject: Re: Re: THX migration - many questions
Organization: HP SESD, Fort Collins, CO
Newsgroups: rec.audio

In rec.audio, cauble@cbnewsj.cb.att.com (Troy Cauble) writes:

>> THX is **NOT** a technology, or even a standard.  It is
>> a **CERTIFICATION PROCESS**.  THX is a trademark that
>> can only be applied after the certification process 
>> has taken place (and fees paid to Lucas :-).

>So what's your point?  It takes some technology to implement
>the decoding to pass the certification, yes?

THX has ABSOLULTY NOTHING to do with technology or decoding.  It had
NOTHING to do with Dolby Surround or Pro Logic.  What it is is a
certification for a minimal level of quality in a sound reproduction
system.

It was started as a method to bring the audio side of theater (or home
theater) up to film standards.  A great many theater still exist using
50-60's sound systems.

The THX people have a list of 'accepted' components which meet this goal.
The theater owner can use other compoments but these must first be
accepted as meeting the level of quality.  Surround Sound systems often
use use the Dolby method but they are NOT required to do so.

Theater must get sound checked for accoustical properties also.  The
world's best equipment may still sounds bad so acoustical treatments may
be required.  This process must be re-certified on a annual(?) basis.

Home THX is the consumer version of the theater certification.  The
difference being that the equipment mnaufacturer can tag their gear as
meeting the approved equipment list as such.

No THX police will not regularly inspect your home but the intent of the
professional certification is up to the owner.  You can this have a THX
approved decoder and a pair $2 speakers.  A theater owner cannot get away
with this but the consumer can.



>Fosgate has one.  It was reviewed in TPV #14.  And I've seen
>ads for one from ADA.  The welcome-to-THX ads list several
>other companies, surely some of them are doing decoders.

>Dolby Pro exploded with a chip set.  (Well, that's my impression
>anyway -- and I got it reading the net 8)  It seems like a logical
>progression to put the THX decoding on one too, IF THERE'S A MARKET.


NO NO NO! There is no THX decoding.  The decoding IS Dolby Pro logic.
That's is what, in this case, THX has approved!


>> Also, since THX is 75% marketing (IMHO), and they trade on that
>> image of exclusivity, I doubt you'll be seeing THX decoders 
>> in Fisher rack systems. Or even in midrange A/V receivers, for that matter.

Unless Fisher decides to raise their standard I would agree with you.  I
also tend to aggree that THX is mostly marketing but it also conveys a
level of quality involved which is strickly R&D.

No where is a THX component REQUIRED to be expensive it just have to be
good.  


>Yeah, but is it unreasonable to expect the decoders to get down
>to say $1000 in the next couple years?

>I have to admint that I've pretty much swallowed the marketing
>and image whole.  Anyone familiar with the THX stuff want to
>comment on the *sound*?

This is exactly the point of the THX certification.


John Adams
Newsgroups: rec.audio
From: fox@cs.nyu.edu (David Fox)
Subject: Re: J&R Music World - My Summary
Organization: Courant Institute of Mathematical Sciences
	<1992Aug12.023026.5914@udel.edu> <4679@blue.cis.pitt.edu.UUCP>
Distribution: na
Date: Thu, 13 Aug 1992 09:17:10 GMT

I deal with J&R face to face a fair bit, and for these reasons:

1. They are strictly non gray-market.
2. Their prices (at least in person) are "almost rock bottom",
   that is, not as good as the gray market prices you see in
   the paper, but only by a fairly small and pretty consistent
   percentage.  Catalog prices sound higher.
3. They are neither rude nor polite, which in this area is as
   good as you can hope for unless you are paying audio boutique
   prices.  On the rude meter, where people who answer phones in
   Utah rate a ten I'd put them around 4.
4. They don't lie with malice.  The worst I can accuse them of
   is mendacity; if they say he read the wrong line he probably
   did it because he was eating something and not paying much
   attention while he was doing it.
5. They have lots and lots of stuff.  Much more than is in the
   catalog.  They have about five stores on one block, a stereo
   store, a computer store, an office equipment store, a portable
   electronics store, and a couple of record stores.
6. They'll probably still be there the next time I go down there.

So there it is.  You take it or leave it, right?
Newsgroups: rec.audio
From: ssr@cypress.com (Bapcha/FPGA)
Subject: Re: The future is now!
Keywords: Spectral DMA 180
Organization: Cypress Semiconductor, San Jose, CA
Date: Tue, 18 Aug 1992 21:27:45 GMT

In article <l8odf0INNama@male.EBay.Sun.COM> checksix@flyboy.EBay.Sun.COM (Al Conte) writes:
>
>In my constant trek for power amp perfection, I have found great differences
>in tonal qualities from amp to amp, even though the price difference from
>amp to amp has ben pennies.
>Well, today I spent lunch hour down at a local shop that carries the
>Spectral line.  Spectral ? you say!.
>Who is Spectral?
>A small firm over here in Sunnyvale Ca.
>The Spectral DMA 180 is IMHO, the finest solidstate amp regardless of
>cost, ever made.

Geeze man - this sucker costs close to $6K including tax tip and license.
For 6K,  I'll design my own amp that's better than these ones on the
market.

Bapcha



From: sheppard@hpnmdla.sr.hp.com (Roger Sheppard)
Date: Wed, 12 Aug 1992 23:49:18 GMT
Subject: Re: J&R Music World - Thumbs down
Organization: Hewlett-Packard, Santa Rosa, CA
Newsgroups: rec.audio

I second a THUMBS UP for J&R. I have ordered from them for years - always
with good results. They have the products they say they do and they
ship on time with great packing. I consider them among the top mail order
houses. I could wish only that their prices were a little better than 
5% less than the published prices. But they do deal if you have a legit
price quote from someone else.

Roger..
Newsgroups: rec.audio,sci.electronics
From: schuster@panix.com (Michael Schuster)
Subject: Re: Tape Deck Help:  Pinch Roller for an Antique
Date: Thu, 20 Aug 1992 13:09:16 GMT
Organization: PANIX Public Access Unix & Internet, NYC
Keywords: Roberts, Reel-to-Reel, Teac

In article <15061@umd5.umd.edu> cgs@snoopy.umd.edu (Chris G. Sylvain) writes:
>
>I am also interested in obtaining a fluid sold in the past by Teac
>for treating/reconditioning the rubber in pinch rollers (Rubber Cleaner
>Conditioner).  Can anyone offer suggestions/substitutes ?

That's TEAC RC-1 Rubber Conditioner.
J&R Music World (check the ads in audio magazines) has it in their
Manhattan store; both alone and as part of the recorder care kit.
Perhaps they'll sell it mail order too. A 4 oz bottle costs $4.95.

-- 
_______________________________Mike Schuster________________________________
NY Pub. Access UNIX/Internet: schuster@panix.com | 70346.1745@CompuServe.COM
The Portal (R) System: schuster@cup.portal.com   | MCI Mail,GEnie: MSCHUSTER
Newsgroups: rec.audio
From: bdboyle@erenj.com (Bryan D. Boyle)
Subject: Re: Just How Stupid Am I, Anyway?
Organization: Exxon Research and Engineering, NJ
Date: Thu, 13 Aug 1992 18:01:17 GMT

Yes, you will eventually destroy the vinyl (back at WFUV in my
college days, and later in professional life...) we called it 
"cue burn"...just take a listen to the lead in track of a 
popular record and you will hear it (especially if people don't 
know how to slip cue properly...).  Suggestion:
bite the bullet and put it on a cart...
 
Bryan D. Boyle     | Opinions mine, not Exxon's...
Senior Engineer    |
Telecom/Network Ops| I fly because I can...
Newsgroups: rec.audio
From: jeberger@novell.com (John Berger)
Subject: Re: DAK dbx satellite/subwoofer speakers - opinions?
Keywords: DAK dbx speakers
Organization: Novell, Inc.
Date: Thu, 13 Aug 1992 00:38:48 GMT

In article <Bsw90E.3H7@news.udel.edu> dsnead@bach.udel.edu (David T Snead) writes:
>Subject: Re: DAK dbx satellite/subwoofer speakers - opinions?
>In article <4716@balrog.ctron.com> donegan@ctron.COM (Dave Donegan) writes:
>>Has anyone purchased the $299 dbx satellite/subwoofer speakers?  The 
>>subwoofer has its own 140W amplifier.  
>
>The jist is the DAK bought the dbx name and is selling utter crap.
>How good of a sat/sub are you really gonna get for $300?
>
>Dave
>
>Disclaimer: This is just a recap of what I remember from previous
>articles, I have never purchased anything from DAK.
Well, since I HAVE purchased something from DAK (a dbx subwoofer, but not 
this particular one), I guess I should pipe in with my $.02.  

I disagree with the "utter crap" designation here, at least with the 
subwoofer that I bought (the dbx 15" dual-voice coil that they have 
offered for $150).  It can be crossed over actively or passively, so you can 
upgrade in phases, the cabinet is quite solid, and it matches quite well 
with my Threshold/Acoustat/Nakamichi/Denon/Hafler system.  True, deep 
bass   (not a "thump at 60 hz").  My musical tastes are eclectic (classical 
to jazz to Grateful Dead), and they match quite well.  I'm sure it's not a 
Velodyne, but you can't get them for $150 either...

I found DAK to be very easy to deal with over the phone.  They were out of 
stock at the time that I ordered, and told me so over the phone, and 
later sent a card to confirm this, but it still arrived within 2 weeks.  

You can try them out for 30 days, and you're only out the freight if you 
send 'em back....