HDTenEightyP/NetNews huggingface dataset:
From: ultron@csd4.csd.uwm.edu (Andrew H Krieg)
Newsgroups: rec.audio.car
Subject: Annoying whine when tapes play
Date: 24 Jan 1993 18:00:44 GMT
Organization: Computing Services Division, University of Wisconsin - Milwaukee
NNTP-Posting-Host: 129.89.7.4

My car tape player produces an annoying whine whenever tapes play.  If I just
listen to the radio, it sounds fine.  I replaced the original stereo that
came with the car, and both systems have had this problem.  The whine is
directly related to some part of the electrical system of the car.  When I
accelerate or decelerate, the whine changes pitch.

Recently, I bought a Car Discman which plays through the tape deck, and the
whine is now intolerable.  Does anyone have any suggestions as to what is
wrong so I can get this fixed?  
-- 
=     Andrew Krieg	| 						=
= krieg@titan.med.ge.com|  Treguna   Mekoides   Trecorum   Satis   Dee	=
=	   or		|						=
= krieg@point.cs.uwm.edu| 				    - Astoroth	=
Newsgroups: rec.audio
From: bstdenis@mailbox.fwrdc.rtsg.mot.com (Brian St. Denis)
Subject: Re: Where can I ftp "Perfect Box"
Organization: Fort Worth Research and Development Center, Motorola, Inc.
Distribution: rec
Date: Thu, 21 Jan 1993 22:59:07 GMT


I have PerfectBox.  Send e-mail and I'll send it.

PS.  To those of you who have asked me to send it and still have not
received it, I tried but your address was unreachable.

-- 

---------------------------------------------------------------------------
Brian St. Denis                       | "Will administer for food."
Computer/Network Administration       | Apollo:  just like real unix.
Fort Worth Research and Design Center | e-mail: bstdenis@fwrdc.rtsg.mot.com
Motorola Inc.                         | phone:               (817) 232-6129
Newsgroups: rec.audio
From: roth@3d.enet.dec.com (Jim Roth)
Subject: Re: Anti-aliasing on the recording end?
Organization: Digital Equipment Corporation
Date: 24 JAN 93 22:24:54    


In article <shetline-230193113049@128.89.19.90>, shetline@bbn.com (Kerry Shetline) writes...
>In article <1993Jan23.073000.13305@news.columbia.edu>,

>The advantage of recording with a higher sampling rate is that you don't
>need steep analog input filters. But this does mean that there can be
>frequencies greater than 22.05 emmbedded within the data stream. So you
>can't just throw away the extra samples. The data has to be processed to
>remove the higher frequencies.

This is *NOT* the reason for oversampling A to D converters.  It's in fact
a rather minor side benefit.

Also note well that while it was fashionable to blame minimum phase "brick
wall" filters for all that was wrong with digital audio in the early days,
there are just as steep filters in oversampling ADC's, except that they're
implemented digitally, and that the phase distortion of minimum phase
antialias filters is inaudible.  You need about an order of magnitude
more group delay dispersion than typical analog minimum phase filters
have to start having a problem.  The problems with old style filters
had nothing do do with group delay, or the fact that they're minimum
phase.

(This fact about filtering can be easily demonstrated with some DSP
hardware:  record some audio and process it with a minimum phase digital
filter (say, a recursive filter) twice; then process it again twice
except in time reverse on of the passes.  The second signal will have
the same amplitude response but clearly linear phase.  Now see if you
can hear a difference.  You won't unless the phase distortion is *really*
horrible, like from making many passes thru the filters...)

- Jim
From: pjh@mccc.edu (Pete Holsberg)
Newsgroups: rec.audio
Subject: Distributing Sound Questions
Date: 23 Jan 93 03:36:37 GMT
Distribution: na
Organization: The College On The Other Side Of Route One

A friend has 5 sets of stereo speakers and he would like to be able to
control them so that he can send the sound to any combination of one or
more sets. He'd also like to control the volume of each speaker set at
the sound source rather than at the speakers, but if that's not a good
idea, I'm sure he'll relent.

The speaker sets probably have different power ratings, if that makes a
difference in your advice.

What does he need to buy (or make) to get the control he wants?

Please email; I'll post a summary.

Thanks.
From: kirk@hpcc01.corp.hp.com (Kirk Lindstrom)
Date: Thu, 21 Jan 1993 21:32:55 GMT
Subject: Re: Apogee Centaur Minor stand
Organization: Shredding the water of SF Bay, HP-OCD
Newsgroups: rec.audio

>Fortunately for me, a friend of mine picked up a couple large blocks of
>granite that approximately match the finish on my Stages and, once I
>work up the enthusiasm (and assistance) to get them into the house, I'll
>probably set the speakers on those.  Personally, I think the result will
>be more interesting than the stands that Apogee makes and much cheaper.
>
>Trygve 
----------
Yes, like how will you vacuum under the stands?

Here's a thought, put the stands on you CD player/Turn-table (pick-one)!

Kirk (on, not under) out
From: kong@leland.Stanford.EDU (Kong Kritayakirana)
Newsgroups: rec.audio
Subject: Re: CD vs. LP again (was Re: Preamp and Amp)
Date: 27 Jan 93 05:19:48 GMT
Organization: DSG, Stanford University, CA 94305, USA

In article <1993Jan26.174004.11597@spang.Camosun.BC.CA> dbarker@spang.Camosun.BC.CA (Deryk Barker) writes:
>stuartw@ccu1.aukuni.ac.nz (Stuart Woolford) writes:
>[....]
>: Tell me, people, what kind on channel seperation can ANY ( at ANY price )
>: practical LP system get ??. I will not mention the figures that I have
>: heard, but they are not impresive, and many 10's of db below that of
>: even quite cheap CD.
>
>You can only laugh if a) you have heard a high quality turntable setup
>and b) still found its imaging to be 'laughable'. Numbers by
>themselves mean zilch.
>
Looking at poor spec (esp. channel separation) and try to attribute this to
LP imaging quality is not quite logical.
I have heard LPs with very good imaging although the cartridge in use has
channel separation of only 25-30dB. Yes, "Numbers by themselves mean zilch."

Kong Kritayakirana

Watch out for my new .sig!
Newsgroups: rec.audio
From: moskowit@panix.com (Len Moskowitz)
Subject: Re: CD player through old amplifier sounds terrible
Organization: Panix Public Access Internet & Unix, NYC
Date: Fri, 22 Jan 1993 14:35:04 GMT

Morgan Besson writes:
>Today I plugged my Sony portable CD player into a vintage 1965 solid state
>amplifier (Lafayette 125T) and it sounded awful.  This is not a terrible
>amp, and I tested it with a tuner and it sounds fine.  I tried the CD
>at various inputs, with different speakers, headphones, etc., but it
>was always the same.  There is no brilliance to the sound.  It's like
>an AM broadcast.
>
>Is there any known problem with this setup?  Thanks in advance for replies.

Yes.  Those first generation solid state amps are incredibly awful
compared to even the worst and cheapest of today's mass market mid-fi
amps.  That includes all the early Dynaco stuff (PAT-4, PAT-5, SCA-80,
ST-120, ST-150).  

My advice: give it away.

-- 
Len Moskowitz
moskowit@panix.com
Newsgroups: rec.audio
Subject: Old CD Player and New CDs
From: omf@pyros.hacks.arizona.edu (Oscar Fowler)
Date: 22 JAN 93 21:03:25    
Reply-To: omf@pyros.hacks.arizona.edu
Distribution: world,local
Organization: Sirius Cybernetics Corporation
News-Software: VAX/VMS VNEWS 1.4-a4  

Here's an interesting problem:  I have an old JVC portable CD player
(PC-V2 1987) which plays all of the CD's I bought years ago (even
the ones which are NOT in good shape...)

I've noticed that I have problems playing CD's bought in the last few
months, however!  There are about four CD's which my player just
keeps spinning around and around trying to get the track info from,
but never making it.

I know the CD's are good, since another deck will play them without
complaining...

I'm actually just curious to see what you folks think the reason behind
this might be.  Have CD manufacturing processes somehow changed in
the last few years, enough so that my old CD player can't handle the
difference?

Anyway, it IS time to buy a new player - so if anyone has some good
recommendations, I'd be most interested in hearing them.

Thanks,
Oscar
From: shetline@bbn.com (Kerry Shetline)
Newsgroups: rec.audio
Subject: Re: how MiniDisc sounds
Followup-To: rec.audio
Date: 24 Jan 1993 03:34:05 GMT
Organization: BBN
Distribution: world
NNTP-Posting-Host: bbn.com

In article <2787@eagle.ukc.ac.uk> nm1@ukc.ac.uk (N.McBride) writes:
>I honestly thought it sounded terrible. Really bad. The
>treble was just falling apart, timing and `drive'
>were very poor, and the bass weak. All in all extremely nasty.

I'm still reserving my judgement on MD until I can hear a comparison of an
MD recording to a CD of the same material using a better transducer than
some crummy demo headphones. But I found your description of the treble
'falling apart' interesting. It seemed to match my impression their was
something oddly 'crunchy' about some high notes or any mid-to-high pitch
sound with a sudden attack -- piano and cymbal stick out in my memory as
having this strange distortion.

I'm not usually one to engage in this kind of wine-tasting-esque audio
babble. It's too easy to let ones imagination run wild. But I think that
it's an interesting parallel that we might have here in our experiences.

-Kerry
From: guerra@solbourne.com (Edi Guerra)
Newsgroups: rec.audio
Subject: ***** TECHNO 12" MIXING RECORDS 4 SALE *****
Date: 28 Jan 1993 09:14:01 -0700
Organization: Solbourne Computer, Inc., Longmont, CO
Distribution: world
NNTP-Posting-Host: ollie.solbourne.com

I have two 12" records 4 sale.  I purchased both in the beginning of January
of 1993 (New release).  These records are played in the Chicago Clubs.


FIRST RECORD=   House of Gypsies        Samba by Kool Life
                Side A= TEE'S FREEZ MIX
                Side B= KOOL LIFE CLUB DUB
                        SAMBA SUB MIX

                PRICE= $5.00 (plus shipping)


SECOND RECORD=  ELECTRO SOUND TAKE 4 MEGA MIX BY THE UNITY MIXERS
                Side A= ELECTRO SOUND EXTENDED CLUB MIX
                Side B= LOGIK MACHINE REMIX

                PRICE= $10.00 (plus shipping)

*** I will also be selling most of my TECHNO tapes in the future let me know
if anyone is interested in Chicago Style TECHNO.***

EMAIL ME @ guerra @solbourne.com

Newsgroups: rec.audio
From: moskowit@panix.com (Len Moskowitz)
Subject: Re: Liquid Cooled Speakers?
Organization: Panix Public Access Internet & Unix, NYC
Date: Fri, 22 Jan 1993 14:39:15 GMT

Richard D Pierce writes:

>There are some problems, though. The viscosity of the oil changes with
>temperature, so that the damping effects are reduced at high temperatures.
>The oil can tend to "wick" out of the gap if there are any very narrow
>gaps or absorbent materials near by (like the paper cone of a tweeter).

Also, over time, small amounts of the ferrofluid can be forcibly ejected
from the gap eventually resulting in performance changes.

-- 
Len Moskowitz
moskowit@panix.com
Newsgroups: rec.audio
From: fff@microplex.com (Fred Fierling)
Subject: speaker phasing
Organization: Microplex Systems Ltd.
Distribution: na
Date: Thu, 21 Jan 1993 20:31:32 GMT

Do speaker manufacturers follow a standard for speaker phasing and terminal
colours?  In other words, if the red terminal is made positive with respect
to the black can you assume the speaker cones move in the same direction
regardless of manufacturer?
-- 
Fred Fierling    fff@microplex.com      Tel: 604 875-1461   Fax: 604 875-9029
Microplex Systems Ltd   265 East 1st Avenue   Vancouver, BC  V5T 1A7,  Canada
Newsgroups: rec.audio
From: eacj@theory.TC.Cornell.EDU (Julian Vrieslander)
Subject: Re: Thiele cs2.2 opinions wanted...
Organization: Cornell Theory Center
Date: Tue, 26 Jan 1993 20:54:06 GMT

In article <cfNB6fS00iV0A_nXQl@andrew.cmu.edu> dd36+@andrew.cmu.edu (Daniel M. Deright) writes:
>
>In regards to the Theil CS2.2's (it is spelled Theil, by the way)  I
>listened to them extensively when I purchased speakers about a year ago.

Nope.  It's spelled Thiel.  And the speaker is now called the model CS2 2.
I guess we are supposed to pronounce this "two two" or "two space two."
They originally called it the model 2.2.  But apparently Bose, Inc. has a
trademark on decimal points, at least when used for speaker names.
 
According to Stereophile, it is not clear that such a trademark could hold up
in court, but Bose has a lot more lawyers than Thiel.   I would like to tell
you what I really think of Bose, but they would sue me.  Background info:
Bose sued Consumer Reports magazine for publishing a less-than-worshipful
evaluation of a Bose product.  Fortunately for audio and the first amendment,
they lost.

The 2 2 is indeed a very nice speaker.  I heard them demonstrated, along with
the newer model 4.6 (4 6?) at Innovative Audio in Brooklyn last summer.  It
was not at all obvious to me that the bigger Thiel sounded significantly
better.  Although the IA staff claimed that the demo room was too small
for either of the speakers to really show their stuff.
-- 
Julian Vrieslander 
Neurobiology & Behavior, Mudd Hall, Cornell University, Ithaca NY 14853    
INTERNET: eacj@theory.tc.cornell.edu     BITNET: eacj@crnlthry
UUCP: ..cornell!batcomputer!eacj
Newsgroups: rec.audio
From: boop@cbnewsi.cb.att.com (joseph.a.lapenta)
Subject: Equipment for Sale
Organization: AT&T
Distribution: usa
Date: Sun, 24 Jan 1993 21:19:44 GMT




EQUIPMENT FOR SALE:

Hafler XL-280 power amp (145 W/channel).............$390

Hafler DH-110 pre-amp...............................$250

Denon DCD-910 CD player.............................$259

Spectrum 410 loudspeaker............................$269

*All equipment is in excellent condition and has original boxes
 and manuals.



Joe LaPenta
(201) 386-4883
Newsgroups: rec.audio
Subject: Re: average 'life' of a CD player ?
From: lou@yfn.ysu.edu (Lou Anschuetz)
Date: Fri, 22 Jan 1993 11:54:36 GMT
Organization: Youngstown State/Youngstown Free-Net
X-Newsreader: TIN [version 1.1 PL8]

Alan Peterman (al@qiclab.scn.rain.com) wrote:
: In article <1993Jan17.042358.23916@omen.UUCP> caf@omen.UUCP (Chuck Forsberg WA7KGX) writes:
: >
: >Over the years the drawer started sticking more and more.
: >Opening the drawer required increasing patience and rhythmic
: >dexterity :-)   I've had it apart several times but couldn't find
: >anything.  I replaced it because I got fed up with the ritual.

: Common problem with Sony CD players, and almost ALWAYS the drive belt
: that opens the door.  The loading motor is under the drawer (which
: snaps out upwards) and drives the door through a small rubber belt.
: Replacing it is a 5 minute, $2 fix...
Thanks for this info, had the same problem on mine since day 1.

But, I have also had another flaw, which has caused me to get rid
of my Sony CDP-55 recently.  When I first bought it, it would skip
beginning on the second or third track of the second CD played.
Sony supposedly fixed it, but it is back again.  I felt it wasn't
worth my out of pocket expense this time (it was bought in December 
of 1986).  By the way, this is so irritating (especially since
repair droids won't believe me and show me that it plays one cd
just fine!, that I won't be back to Sony....
From: jhenders@jonh.wimsey.bc.ca (John Henders)
Newsgroups: rec.audio
Distribution: tp
Organization:  One of these days for sure
X-News: HERMES MMAIL 1.10 Rev. Dec 15 1992
Subject: Re: The Bose flame war
	<1993Jan19.174511.25808@gallant.apple.com>
	<RLK.93Jan19144459@underprize.think.com>
Date: Wed, 20 Jan 1993 23:26:58 -0800
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit

In <RLK.93Jan19144459@underprize.think.com> rlk@underprize.think.com
	(Robert Krawitz) writes:
...
>In article <80693@hydra.gatech.EDU> John Newsome,
>jnewsome@prism.gatech.EDU writes:
>>If this man's concept is so flawed, then how does his 901's stay so
>>popular, and why do I see them in such a wide range of applications such
>>as; in clubs, theatres, concert halls and a lot of other places.  I see
>>them more than I see any other speaker listed here in this group.

>Not to mention that PA is entirely different from home audio...

	Not so different that Bose is that well respected there either. An
important thing to remember in live audio is that the technicians who
actually have to mix on systems are rarely consulted on either their
purchase or instalation. At the World's Fair held here long enough ago
that I hope some statute of limitations is in effect, we had to literally
blow up some gear in order to get functional replacements.

-- 
		 John Henders
		 Vancouver,BC
From: calvin@lysator.liu.se (Chris Maluszynski)
Newsgroups: rec.audio
Subject: 47St. Photo fax number wanted.
Date: 21 Jan 93 00:53:15 GMT
Organization: Lysator ACS at Linkoping University

Yup,  I'm looking for 47St. Photo's fax number.
Does anyone have it?

	-Chris

--
	      
	      ------------------------------------------------
	      If you got the feeling - jump across the ceiling.
	      ------------------------------------------------
Newsgroups: rec.audio
From: DPierce@world.std.com (Richard D Pierce)
Subject: Re: CD Sound under attack again. Was: Re: Preamp and Amp
Organization: The World Public Access UNIX, Brookline, MA
Date: Sat, 23 Jan 1993 23:01:27 GMT

In article <5494@calmasd.Prime.COM> jpb@calmasd.Prime.COM (Jan Bielawski) writes:
>	Which reminds me...  An analog tape recorder cannot reliably record 
>more of the frequency spread than about 8 1/2 octaves.  Beyond that range
>the frequency response is probably too low to be called "high fidelity."
>If the tape moves fast one can record high frequencies very well but
>not the low ones as the corresponding magnetic flux with respect to any 
>tape segment changes too slow to magnetize that segment strongly enough.
>If the tape is moving slow then the highs disappear.  No matter what, the
>recordable frequency range is fixed although it can be adjusted up or
>down by choosing the tape speed.
>
>	My question is: why aren't CD critics bothered by this?  To me
>it's a serious problem that seems to indicate that the only analog way
>to record is direct to disk.

Probably because what you just said simply isn't true. I have a couple of
Revox A-77's sitting around. These are 20 year old machines, so we're not
talking state of the art, okay? (though they are very good).

At 0 VU, my 1/2 track high speed machine measures 18-26 kHz +- 1.5 dB, or
about 10 1/2 octave. The 1/4 track normal speed machine measures +-2 dB out to
about 22 kHz, about 10 1/3 octaves. BZZZT, you loose.

Whoever sold you the piece of information about analog tape not being
able to record reliably better than 8 1/2 octaves certainly got the better
half of that deal. I would strongly suggest you take that piece of data
back and wump 'im upside the head with it, cuz it's wrong.


-- 
|                Dick Pierce                |
|    Loudspeaker and Software Consulting    |
| 17 Sartelle Street   Pepperell, MA  01463 |
|       (508) 433-9183 (Voice and FAX)      |
Newsgroups: rec.audio
From: DPierce@world.std.com (Richard D Pierce)
Subject: Re: What happen to dbx?
Organization: The World Public Access UNIX, Brookline, MA
Date: Sat, 23 Jan 1993 13:19:20 GMT

In article <palane.727767661@pv7426.vincent.iastate.edu> palane@iastate.edu (Paul A. Lane) writes:
>In <1993Jan22.194204.12111@galileo.cc.rochester.edu> sr001b@uhura.cc.rochester.edu (s. satya vardhan reddy) writes:
>
>>What ever happen to the dbx noice cancellation. I believe that it is still
>>better than Dolby S or Dolby HX Pro. I bought two tape decks with it in the
>>middle 80's but I don't even hear of it anymore.
>
>It's dead, Jim. I think the proponents of Beta might have similar objections.
>I wonder if dbx is still around. I know they came out with a line of speakers
>and electronics, but haven't heard a peep from them in quite some time.
>

DBX pro equipment is alive and well and living under the auspices of AKG
Acoustics. There are some 20-25 products in the line including noise
reduction systems, compressor/limiters, equalizers, and so on.

-- 
|                Dick Pierce                |
|    Loudspeaker and Software Consulting    |
| 17 Sartelle Street   Pepperell, MA  01463 |
|       (508) 433-9183 (Voice and FAX)      |
Newsgroups: rec.audio
From: vivek gupta <vigupta@cs.indiana.edu>
Subject: Recommendations on Audio System
Organization: Computer Science, Indiana University
Date: Fri, 22 Jan 93 21:24:49 -0500

Hi,

I am considering soon buying an audio-system to be integrated with
a LD Player, VCR and TV. A full home system. However, I also listen
to a lot of music seperately also, in addition to enjoying theater
effects when watching movies.

I am not tone completely tone deaf, but am definitely not as good
as some at picking up errors in recordings, between different 
mediums. What are some recommendations as to how to start building
an audio system that can be merged with a video setup (laser disc,
tv, vcr), which may have s-video or optical in outs. 

What components do I start with, I may not (definitely don't) have
the money to buy everything at once, but would like to start adding
pieces. Or should I wait and buy like a complete system? What are good 
brands to buy?

Any help is appreciated. Please email directly.

Thanx in advance,
Vivek Gupta
vigupta@cs.indiana.edu
From: milamber@rahul.net (Robert Yang)
Newsgroups: rec.audio
Subject: Mail order Definitive Tech?
Date: 22 Jan 93 19:09:28 GMT
Distribution: rec.audio
Organization: a2i network

Hi,

    does anyone know of any good (reliable) mail order houses which sell
Definitive Technology speakers?  Reply by post or e-mail.  I'll compile a
list and post it here if there are a sufficient number of replies.

Thanks,
Robert

-- 
Robert Yang <milamber@rahul.net>
Newsgroups: rec.audio
From: rsd@sei.cmu.edu (Richard S D'Ippolito)
Subject: Re: power amps blowing tweeters
Organization: The Software Engineering Institute
Date: Wed, 27 Jan 1993 09:28:40 EST


In article <C183IH.M7D@world.std.com>, Richard D Pierce writes:

|> In article <1993Jan21.153319.12834@sei.cmu.edu> Richard S D'Ippolito writes:

[chart omitted]

 
|> Well, ok, except for several facts. First, it's seldom a 20 kHz sine wave
|> that clips an amplifier, it's more like stuff much lower and more complex,
|> so that splatter is much denser and lower frequency then your table would
|> have us believe. So while the table above is interesting in an academic
|> sence and certainly correct only as far as it goes, it is a poor
|> approximation of reality.

It follows the assumptions made in the previous articles, including yours,
where the starting point was 20KHz.  I made no claims for the model and was
just trying to help a fellow out to understand RMS.

 
|> Secondly, you've made an assumption about how the impedance rises above 20
|> kHz which is simply not correct. The standard model for voice coil
|> impedance which consists of a single linear inductor in series with a
|> single linear resistor is to simple to the point of being seriously flawed
|> for just this kind of example (not your fault, the literature seldom gets
|> it right also). 

Well, again, I was using the given assumptions.  Having measured various
speakers and worked with many electro-mechanical systems, I know that the
models are more complex.  It was not my intent to present a definitive
treatise.  For the record, here is one set I made on a 3-way system including
crossover.  I didn't have the time to repeat them beyond the crossover.

freq	Zmag

1KHz	8.5 ohm
3	18
9	11
15	11
20	13
100	28
500	70

Please don't blame me for the gentleman's assumption of clean clipping,
either.  I already noted that.

Cheers,

Rich
Newsgroups: rec.audio