HDTenEightyP/NetNews huggingface dataset:
From: dave@pipi.iis.u-tokyo.ac.jp (David Wuertele)
Subject: Re: MD and DCC encoding-request for info
Followup-To: rec.audio
Organization: Institute of Industrial Science, University of tokyo.
Date: Wed, 30 Dec 1992 14:49:52 GMT

In article <shetline-271292211904@128.89.19.80> shetline@bbn.com (Kerry Shetline) writes:
> If they [MD or DCC] only handle PCM data, would there be a generational
> degradation when copying MDs/DCCs (forgetting about serial copy mgt for the
> moment)? It seems to me quite likely that there could be -- calculation
> round-offs, inconsistent "framing" of the PCM data stream...

Yes, there will be if there is any type of vector quantization going on in
the compression (block transform + quant schemes are a subset of all
vector quant schemes), because the PCM data stream has no framing
information to keept the vectors consistent.  There is also a possibility
that pre- and post- filtering is conducted, which will degrade even more.

Dave

Newsgroups: rec.audio,rec.video
From: dave@news.ccutah.edu (dave martin)
Subject: Re: Surround Sound detractors <=> LP holdouts
Organization: University of Utah Computer Center
X-Newsreader: Tin 1.1 PL3
Distribution: usa
Date: Sun, 3 Jan 93 23:40:53 GMT

A10035@email.mot.com (Scott Lindsey) writes:
: ...... Anyone who owns a 
: quality stereo system knows that a voice can be imaged anywhere in front of
: you ==> IMHO, Center channel not necessary in home systems.

Try having a room full of guests over for some video event.  Not all of them
can sit in the sweet spot.  A center channel provides dialog (and toward the center sound effects) coming from the screen for everybody.

dave@csulx.weber.edu (ignore the header, its probably wrong)
From: hou@siemens.com
Newsgroups: rec.audio
Subject: Help: Soundless CD Player
Date: 22 Dec 92 14:14:51 GMT
Distribution: usa
Organization: Siemens Corp. Res., Inc.

I have an Onkyo CD player for about two years, and use
it infrequently. Recently, the sound disappeared. 
Before I send it to the dealer for repair, I would like
to get someone's opinion. 
  Is there a way I can fix it myself? 
  If it must be done by the dealer, how much should
  it cost for reasonable charge? (I bought it for $170)
Any help would be greatly appreciated.
Tai

---

Tai Hou (hou@siemens.siemens.com)
Newsgroups: rec.audio
From: jsmith@ug.cs.dal.ca (Jeff N Smith)
Subject: DENON---AVR-610
Organization: Math, Stats & CS, Dalhousie University, Halifax, NS, Canada
Distribution: na
Date: Tue, 29 Dec 1992 19:54:04 GMT

Hello,
	I have the chance to buy a DENON  AVR-610 surround receiver for
the deal cost price.  I what I am looking for is some information 
about the sound quality of this unit.  Personally I think it is better 
than a Sony but not quite as good a Yamaha.  I am on the student budget
so that has a lot to do with it.  The Denon is a few hundred dollors less
that the Yamaha so this is must to do with my choice. 

	Please e-mail or post any opinions good and bad that you have on 
this receiver.  E-mail would be prefered..

Thanks
Jeff

jsmith@ug.cs.dal.ca	Dalhousie University
From: yuen@casbah.acns.nwu.edu (Geoffrey L Yuen)
Subject: Pioneer karaoke & combi,
Reply-To: yuen@casbah.acns.nwu.edu
Organization: Northwestern University, Evanston, Illinois
Date: Tue, 22 Dec 1992 22:38:19 GMT

Have anyone make comparison about the video quality of
similarly priced Pioneer combi players & karaoke machines
like the CLD 720 or 820; the ads about these machines are 
always very different. While the combi players always talked
about TBC, aspherical lens, S/N ratio, lines resolutions,  karaoke
machines from Pioneer never give these specs. I am looking
for a karaoke machine that has high quality video (425 lines,
s-VHS).

Many thanks in advance.

-Geoff
From: chrisc@gold.gvg.tek.com (Chris Christensen)
Newsgroups: rec.audio
Subject: Re: Room treatments
Date: 29 Dec 92 18:56:42 GMT
Organization: Grass Valley Group, Grass Valley, CA

In article <19921229.062755.578@almaden.ibm.com> barron@rhqvm14.VNET.IBM.COM writes:
>Does anyone have any suggestions for frequency specific as well as
>general room treatments?

>I measured the response of my room yesterday to find a 10db+ peak
>at 54hz (corresponds to my roughly 22 ft long room) plus the harmonics
>plus resonance at the room height and room width, but not as much a peak
>as due to the length.

One poster suggested that a parametric equalizer should be used to
solve this problem.  I have gotten into this before and I will again!
Equalization is useless for control of room modes.

What you have is a room that is resonant at a frequency.  If you have
a speaker that is perfectly flay in frequency and phase response you
will still have the peak.  The use of an equalizer will reduce the
output of the speaker at that frequency but it can't eliminate the
basic cause ofthe problem..........

The devices that are used to treat problems at tha frequency you have
are beyond the simple room tune and other simple surfect treatments.

If you have a good book on acoustics and the solutions, and if you have the
means to build simple construction projects you may be able to take
care of the problem with a bass trap.  The problem is that the trap
may interfere with the architectural aspects of your room.

If you don't have a good book on acoustics I suggest F. Alton
Everest's book "The Master Handbook of Acoustics", second edition. A
basic text that can help you, I believe.
-- 
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: grr@cbmvax.commodore.com (George Robbins)
Newsgroups: rec.audio
Subject: Re: CD Changers
Date: 2 Jan 93 01:56:43 GMT
Reply-To: grr@cbmvax.commodore.com (George Robbins)
Organization: Commodore, West Chester, PA

In article <SLIN.92Dec29105014@regal.cisco.com> slin@cisco.com (Steven Lin) writes:
> 
>    In article <SLIN.92Dec23140812@regal.cisco.com>, slin@cisco.com (Steven Lin)
>    says:
>    >
>    >This may not be important to many people, but 6-CD magazines are
>    >standarized, so if you have several CD players (say, one in your car
>    >and one at home), you can quickly move the magazine from one CD player
>    >to another.
> 
>    standardized? There are at least two types of 6 disk magazines: the
>    Pioneer, where the trays swing out in a semi-circle; and the Kenwood/
>    JVC type where the trays slide straight out and back.
> 
>    Allen
> 
> I stand corrected.  I have never seen the Kenwood/JVC type so I don't
> know how popular they are, but the so-called Pioneer type cartridge
> seems to be popular.  Denon and Pioneer both make CD players that can
> accept Pioneer type cartridges.  You can identify these cartridges by
> an emblem consisting of six overlapping rings.

Actually, the Pioneer ones seem to be the winner, in that they are most
commonly used and available even at places like Radio Shack.  A third
"standard" was the one previously used by Sansui/Kenwood, but newer
Kenwood changers seem to have switched to the JVC type and I don't thin
Sansui is making any catridge changers now.

The Sansui ones are much like the Pioneer version, but not compatible.
The identifying symbol seems to be 6 slashes ////// instead of the
overlapping circles.

-- 
George Robbins - now working for,     work:   to be avoided at all costs...
but no way officially representing:   uucp:   {uunet|pyramid|rutgers}!cbmvax!grr
Commodore, Engineering Department     domain: grr@cbmvax.commodore.com
From: andrew@alice.att.com (Andrew Hume)
Newsgroups: rec.audio
Subject: Re: Stereo Review's critical judgement
Summary: audiophile mags do low end as well
Date: 2 Jan 93 03:46:57 GMT
Article-I.D.: alice.24533
Organization: AT&T Bell Laboratories, Murray Hill NJ

In article <1993Jan1.015237.447@leland.Stanford.EDU>, paulxxxx@leland.Stanford.EDU (paulastya gupta) writes:
> I agree with most persons that Stereo Review is not an altogether good
> source of information, but it does help ground one to reality (its OK to 
> not be able to afford 20k for a system).  


	i would point out that according to a study submitted to
the letters section of stereophile, the high-end mags like
stereophile and TAS actually reviewed a higher percentage of low
end componets than did either audio or stereo review. hard to believe
but the evidence was there (a one year sample).

	andrew hume

p.s. for my money, stereo review is worthless except for the rodrigues
cartoons.
Newsgroups: rec.audio
From: billn@hpcvaac.cv.hp.com (bill nelson)
Subject: Re: Dealings with 6th Ave. Electronics
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
Distribution: usa
Date: Sat, 26 Dec 1992 06:37:56 GMT

dj@pixar.com (Dennis Jennings) writes:
: I would appreciate any comments (negative or positive) about any transactions
: you may have had with 6th Ave. Electronics. I have dealt with them, both at 
: their retail location in NYC and their mail order department in New Jersey.
: My experiences were not particularly pleasant and I'd like some input from
: other customers before I proceed in my battle with them. Thank you.

From previous postings to this group, plus others - New York stores, in
general, are to be avoided like the plague. 6th Avenue Electonics seems
to come up quite frequently as being a problem.

Lots of luck - you will need it.

Bill
Newsgroups: rec.audio
From: rsilvers@nynexst.com (Robert Silvers)
Subject: Re: Do I really need 200W?
Organization: Nynex Science and Technology
Date: Tue, 29 Dec 92 17:52:57 GMT

In article <7009@otc.otca.oz> brendan@otc.otca.oz (Brendan Jones) writes:
>
>As to how many watts you need - I reckon not many.  I have a 25 W per channel
>true RMS class A power amplifier, and a comfortable listening volume is 2 to 3
>out of 10.
>
>Turning it up to 4 to 5/10 is *very* loud, and anything over 5 gets to
>seriously annoy the neighbours :-)  It's only been to 10 once (briefly) at a
>rather raging party I once held - it started to sound a little distorted at
>that level, but it may have been my ears 'cause it was bloody loud!

	Amps are usually designed to produce max output on 5.  The only
reason to go past this is when you are listening to a weak source such
as an improper recording.

>
>So from this I think 25 W RMS is plenty, but it also depends on the other
>specs for the amp and the specs for the speakers you're connecting to it.

	This depends on the efficiency of your speakers.  I have KEF 104s
which (I think) produce 89 DB with 1 Watt input when measured 1 meter away.
Yesterday I hooked up a power meter to my output and measured the power at
a generous listening level.  The Amp was putting out about 13 watts average.
Once in a while it would hit 20, maybe 30.  This tells me that something
like a 40 watt NAD unit, which still has headroom left at 40 watts, would
be excellent for most everyone.

						--Rob.
Newsgroups: rec.audio
From: ethan@cs.columbia.edu (Ethan Solomita)
Subject: Re: questions on new digital formats
Organization: Columbia University Department of Computer Science
Date: Wed, 30 Dec 1992 00:00:18 GMT

In article <1992Dec29.204744.7518@adobe.com> caro@adobe.com writes:
>
>Against all this is the common sense guess that the recording industry
>will tolerate only *one* consumer recordable medium for new releases, as
>we have seen with the film industry.  To my surprise, there seems to be
>just as much support for MD as there is for DCC at the moment, but I
>wonder how long that will last?  Is this Beta all over again?
>
	One thing to note: Sony IS part of the recording
industry. And they developed the second standard. Now, perhaps
their two divisions are separate (they should talk to Microsoft
about this 8), but I expect they planned this.
	-- Ethan


-- 
"I have never seen one of these intact before... This is the
famous dead-sea tupperware"

	-- Robin Williams
From: dbarker@spang.Camosun.BC.CA (Deryk Barker)
Subject: Re: Ribbon Forever
Organization: Camosun College, Victoria B.C, Canada
X-Newsreader: Tin 1.1 PL4
Date: Fri, 25 Dec 1992 21:35:36 GMT

jeh@cmkrnl.com writes:
: In article <1992Dec22.214222.2043@spang.Camosun.BC.CA>,
:  dbarker@spang.Camosun.BC.CA (Deryk Barker) writes:
: > jeh@cmkrnl.com wrote:
: > 
: > > Maggie owners tend to LOVE their speakers.
: > > I used to love mine.
: > > However I've since switched back to cones (Vandersteen 2ci, later augmented
: > > by the 2w subwoofer).
: > > I really like the soundstaging and "transparency" that Magnepans deliver.
: > > However... as Corey Greenberg put it recently in _Stereophile_: Panel
: > > speakers don't rock, and never will.
: > > Translated, this means that they compress dynamic range.
: > 
: > Is he the one who can't write a coherent sentence in English? 
: 
: He writes many complete and coherent sentences.  Some of them rely a lot on
: current popular usage and so may be difficult to follow, or even annoying, if
: your only experience with English is from reading a junior-high grammar text.
: Or if you're William Safire. 

I don't recall too many coherent sentences in the stuff of his that I
read. And my experience with English is derived from a 'proper'
education. And no, never in a million years would I have considered
writing speeches for Richard Nixon. Actually, that's not true, I would
have provided him with the following "I resign, I'm guilty, please
lock me up."

: The real trouble with panel speakers is that there are so many things that they
: do "appealingly" -- not necessarily "right" -- that they lead you to not pay
: attention to what they're doing wrong.  

Sound good, bhut would you like to expand on it?
--
Real:  Deryk Barker, Computer Science Dept., Camosun College, Victoria B.C.
Email: (dbarker@spang.camosun.bc.ca)
Phone: +1 604 370 4452
From: andrey@cco.caltech.edu (Andre T. Yew)
Newsgroups: rec.audio
Subject: Re: CD Sound Quality
Date: 30 Dec 1992 02:22:34 GMT
Organization: California Institute of Technology, Pasadena
NNTP-Posting-Host: punisher.caltech.edu

chased@rbbb.Eng.Sun.COM (David Chase) writes:

>In article <vanz.02bd@tragula.equinox.gen.nz> vanz@tragula.equinox.gen.nz (Martin Nieuwelaar) writes:

>>FT, apply the box filter, and IFT.  Providing you have the
>>equipment, this seems to me a better way than using (say) an
>>analog filter that will not have as much slope, and may introduce
>>all sorts of phase distortions.  (Please tell me if I'm wrong).

	Well, you're not right. :)  I don't know how many people had the
stomach/patience to sift through my humongous article where I
tried to prove the sampling theorem, but perhaps I was being
misleading when I started transforming around like it was necessary.
It is always the case that you have to analog filter.  The Fourier
transform (FT) is just a way of looking at a signal -- there is
nothing inherently digital about it.  When you lowpass filter,
you are applying a box filter.  You're also interpolating the
sample points with a sinc (sin(pi*x)/(pi*x), which is 1 at x = 0).
They are two different sides of the same coin, so to speak.  I don't
know what issues I've addressed, so speak up if I didn't seem
to answer your question.

>You may be wrong, but it may be my fault.

	No, it's mine! :)

>2. In general, the Fourier techniques are more often used as an
>   analysis tool, rather than an actual filter implementation.
>   Naively (or abstractly) speaking, the FT assumes a signal that
>   has infinite duration.

	In fact, it assumes nothing like that -- only that its integral
is bounded.  Try FTing a sine wave and see how easy that is.  The
el-cheapo trick I know of doing this is to inverse-FT the delta-
function and say, "Hey, doesn't that look like ..."  I'm sure
there must be a way of doing the forwards integral.

	For those who are curious,

                          infinity
                              /
                             |
         FT( f(t) ) =        |      f(t) exp(- i w t) dt
                             |
                            /
                        - infinity

	    Where i = sqrt( -1 ).  Note that the result of the
integral is a function of w, frequency.  The inverse is similar
except you have dw and exp(i w t) instead.  There are also
some constants in front and they're inverses of each other in
the IFT and FT cases, but they're pretty safe to ignore.

--Andre

-- 
             Andre Yew andrey@cco.caltech.edu (131.215.139.2)
From: kim@Software.Mitel.COM (Kim Letkeman)
Newsgroups: rec.audio
Subject: Re: CD Sound Quality
Date: 24 Dec 92 15:48:17 GMT
Distribution: usa
Organization: MITEL Public Switching, Kanata, Ontario, Canada
In-reply-to: mjf9968@rigel.tamu.edu's message of 19 Dec 92 14:24:00 GMT

In article <19DEC199208241886@rigel.tamu.edu> mjf9968@rigel.tamu.edu (Pi(3.143832666)) writes:

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

There are far more articles from "born again vinylfiles" who had a
sub-$500 CD player and were introduced to analog through the magic of
Linn and ended up with a $3000 vinyl source. It never seems to occur
to them that going up an order of magnitude in the CD domain would
have made pretty much the same sound quality difference.

| 	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?

I believe that most new releases on LD come with both digital and
analog versions of the soundtrack. I haven't read rec.video in a
while, but I got the feeling that the digital versions were preferred.
Maybe someone who has an LD player could correct or confirm this
information?
--
Kim Letkeman	kim@Software.Mitel.COM
Newsgroups: rec.audio
From: tlode@nyx.cs.du.edu (trygve lode)
Subject: Re: Question about rear speakers for surround sound
Organization: Nyx, Public Access Unix @ U. of Denver Math/CS dept.
Date: Mon, 28 Dec 92 20:41:21 GMT

In article <20595@ucdavis.ucdavis.edu> matthews@eecs.ucdavis.edu (Thomas W. Matthews) writes:
>Has anyone tried using an unbaffled driver as a rear speaker?  
>The listening position could be in the null of the rear speaker's
>directional response.  Room reflections would convey the rear channel
>sound to the listeners.  Of course, the reflections off the left wall
>would be out of phase with the reflections off the right wall; the 
>listener would be in the "crossfire".  I don't know how this would be
>perceived.

I've done this myself with what I feel are good results.  The technique
I've used is to mount a reasonable quality full-range speaker on a board
large enough that the shortest path from the front to the rear of the
driver is at least a quarter-wavelength of the lowest frequency of 
interest; the surround channel in Dolby surround systems is bandwidth-
limited to 100Hz to 7KHz, so the baffle plate doesn't have to be very
large and, if you mount it against a wall like I do, the side against
the wall may be as small as desired.  My current setup has four speakers
like this mounted on the side walls with one pair slightly forward of the
listening position, the other slightly behind (about 6-7 feet apart).  I've
tried other placement options, including against or near the rear wall
with less satisfactory results.

The end product is a dramatically diffuse soundfield relatively independent
of listening position--perhaps the most impressive demonstrations of this
technique are several episodes of the new Star Trek, where sound effects
on the ship and various planets really do seem to come from all around and
various off-camera sound effects (such as doors opening) are surprisingly
well "steered" by the front speakers and sound as if they're coming from
specific locations well off to the side and nowhere near any of the speakers.

Trygve
From: sudesh@utkal.njit.edu (T. J. Sudesh)
Newsgroups: rec.audio
Subject: Pioneer's A-757 150+150W/4-ohm Integrated Amp ???
Date: 21 Dec 92 19:11:13 GMT
Organization: New Jersey Institute of Technology, Newark, N.J.

Hi,
   Just a week ago I purchased a Denon DRA-835R amp from NBTW & was pretty
unsatisfied with the product.I really judged the product by the built in tuner
reproduction, since I did not have a CD player.After a lot of research I exchanged
it for a pioneer(A-757) integrated amp.Finally I bought a sony CD player(CDP-297)
and to my dismay, I find the sound quality pretty poor....
					I would greatly appreciate any comments 
on my amp(A-757) and the CD player.I tried listening to ADCOM & Mciintosh at
HARVEYs and was zapped at the perfect reproduction of the same CD, which makes me
think......Have I done the right thing in buying the pioneer.I busted about 
1100 dollars on the same.
			Could someone help me in this regard....

Thankx in advance.....

Warm regards & merry X'mas

	sudesh.
Newsgroups: rec.audio
From: dbarker@spang.Camosun.BC.CA (Deryk Barker)
Subject: Re: Looking for 50/60Hz Frequency Converter
Organization: Camosun College, Victoria B.C, Canada
X-Newsreader: Tin 1.1 PL4
Date: Tue, 22 Dec 1992 21:47:25 GMT

EGQ@psuvm.psu.edu () writes:
: Does anyone know where I can get a 50/60Hz Frequency converter for audio
: equipment.?
: Thank you,
: Mounir Blibeche

WHy do you need one? The only thing that's likley to need one is a
turntable, and the cheaper ones (e.g. Pioneer) always used to supply
50 & 60 Hz pulley wheels as I recall.

I brought the following equipment from England (50Hz 240v) to Canada
(60Hz 115v):

	Linn LP12 turntable (voltage adjusted by retailer)
	Linn LK1 preamp and LK2 power amp. Power supplies replaced by
	Canadian distributor
	Teac V95-RX cassette deck - run successfully off transformer
	Pioneer tuner - ditto
	Meridian Pro-MCD CD player. Power supply tapping changed by
	manufacturer. (Incidentally, for reasons too complex to go
	into here, I ran the an US-export version of the original
	Meridian MCD player in the UK off a 240-120 transformer).

I have never had any trouble with any of the above related to mains
frequency.
--
Real:  Deryk Barker, Computer Science Dept., Camosun College, Victoria B.C.
Email: (dbarker@spang.camosun.bc.ca)
Phone: +1 604 370 4452
Newsgroups: rec.audio
From: deraadt@newt.cuc.ab.ca (Theo de Raadt)
Subject: Re: MiniDisc is here!
Organization: little lizard city
	<92Dec26.142249est.47894@neat.cs.toronto.edu> <28982@oasys.dt.navy.mil>
Date: Mon, 28 Dec 1992 06:27:21 GMT

In article <28982@oasys.dt.navy.mil> curt@oasys.dt.navy.mil (Curt Welch) writes:
   The compression in MD is 2048:424 which is closer to 5:1.
...
   The MD is also designed so the track/sector type information can be
   read off the disk faster than the CD format - which also improves
   seeks times.  But still, I don't expect it to be as fast as a
   floppy - but I sure would like it if it were.
...
   BTW, at the higher read rate, it only takes about 15 minutes to read
   the entire disk (not 74).

What is the actual geometry and spacing of the disk? Is it 72M or 200M
in size or what?
 <tdr.
--

This space not left unintentionally unblank.		deraadt@newt.cuc.ab.ca