HDTenEightyP/NetNews huggingface dataset:
From: naiming@eng.umd.edu (Naiming Shen)
Subject: What filter number to use in designing CD oversampling chip?
Date: Mon, 05 Oct 92 14:45:36 GMT
Organization: Electrical Engineering, University of Maryland
Distribution: na

I have a question for you experienced digital audio guys or DSP guys:
I want to do CD data oversampling, with 16 bits unsigned integer in
and 16 bits unsigned integer out. The filter I'm going to use is a
8 bits and 40 points long filter. The operation involved will be
multiplication(8 bits with 16 bits data) and addition(sum all the 
results of the multiplications). My question is: What kind of number
should I use for this 8 bits filter? 
First I was thinking using unsigned integer, so the results of multiplication
is a 24 bits number, I can drop the lowest 8 bits and keep the highest
16 bits for output. But I loose resolution in this way.
Then I thought using unsigned integer, from -128 to +127, but there is
a possibility that the summation will be negative number, and I assumed
the output 16bits are positive number.
If you netters can give me a clue, I will appreciate very much.

Naiming,

Newsgroups: rec.audio
From: DPierce@world.std.com (Richard d Pierce)
Subject: Andrew Hume, I lost your message
Organization: The World Public Access UNIX, Brookline, MA
Distribution: usa
Date: Sun, 27 Sep 1992 00:52:49 GMT

Sorry for the general post!

Andrew, I got your message, but lost your email address. Try contacting me
again at any time, or leave your return #

Thanks for the brief transgression of the rules!

-- 
|                Dick Pierce                |
|    Loudspeaker and Software Consulting    |
| 17 Sartelle Street   Pepperell, MA  01463 |
|       (508) 433-9183 (Voice and FAX)      |
Newsgroups: rec.audio
From: jbf1@ellis.uchicago.edu (James Bryan Fraser)
Subject: Re: DAT Royalty - Only on blank tape?
Reply-To: jbf1@midway.uchicago.edu
Organization: University of Chicago Computing Organizations
Date: Mon, 28 Sep 1992 20:09:50 GMT

In article <1992Sep28.165922.5140@bmerh85.bnr.ca> shiv@bnr.ca (Shiv Naimpally) writes:
>In article <Bv5pzu.DF5@encore.com>, mpalmer@encore.com (Mike Palmer) writes:
>Better yet, why not put some demo songs on there and use the blank
>as a sampler tape ?  Sony could put excerpts from upcoming
>Sony/Columbia releases . They can promote new artists and save
>consumers the royalty tax !

Sony wouldn't want to do that.  They're the people that profit from
the DAT royalty.  (As a company that produces prerecorded albums.)


Jamie.

From: myers@hpfcso.FC.HP.COM (Bob Myers)
Date: Wed, 30 Sep 1992 18:44:58 GMT
Subject: Re: Stereo Review (was Re: Very expensive cables)
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: rec.audio

> Oh Damn, yet another person who experimented for themselves and broke the
> equations. Time for you "engineers" and "scientists" to run back to your 
> equations for comfort! Remember to recite the equations 20 times to keep 
> reality at bay. If panick sets in re-read the batch other peoples "double 
> blind test" to restore your
> verticle sync. Best of luck!
> 
> 
> ..Rajiv

Oh damn, yet another person who appears to be intentionally missing the point
of the "engineers' and scientists'" posts about cable.  Look, I'll try to
spell it out one more time, as simply as possible.

1. NOBODY is saying that it's impossible for there to be audible differences
   between cables.  Anyone who has compared 12 AWG to 18 AWG, all else being
   equal, would believe that it is possible for a cable change to make a
   difference in the sound.

2. What IS being said - and consistently, repeatedly, MISSED (so often that
   I have a hunch it's simply denial) - is that whatever differences that may
   exist are NOT for some of the wilder reasons that the cable manufacturers
   present as inducement to buy their product, and in fact are due to some
   very ordinary and well-understood things that DON'T require you to spend
   $100/ft. to duplicate.  (Which - dare I say it? - just MIGHT be the reason
   said manufacturers want you to believe the aforementioned bogus reasons!)
   In other words, pay attention to some basics with quite ordinary
   materials, and you can duplicate the results.

Was that clear enough?


Bob Myers  KC0EW   Hewlett-Packard Co.      |Opinions expressed here are not
                   User Interface Tech. Div.|those of my employer or any other
myers@fc.hp.com    Fort Collins, Colorado   |sentient life-form on this planet.
From: chrisc@gold.gvg.tek.com (Chris Christensen)
Newsgroups: rec.audio
Subject: Re: need recommendations for center channel speaker
Date: 29 Sep 92 20:53:35 GMT
Article-I.D.: gold.5311
Organization: Grass Valley Group, Grass Valley, CA

In article <1992Sep29.014746.12945@tamsun.tamu.edu> j0p7771@tamuts.tamu.edu
(Jason Perez) writes:

>  i'm about to get a center speaker for my Dolby Pro-Logic setup.  a Yamaha 
>MX-M70 will be driving this speaker (50W mono).  what's a good center speaker
>to get?  Polk has one for about $140 and Pioneer sells one for about $60. 
>i've heard the Polk and it sounds pretty good, but have not heard the Pioneer
>one yet.

The best center channel speaker for a home theater is one that is
sdentical to the left and right speaker.

-- 
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.
Newsgroups: rec.audio
Subject: Probably a SIMPLE solution...
From: <MIWHC@CUNYVM.BITNET>
Date: Sunday, 4 Oct 1992 03:19:05 EDT
Organization: City University of New York/ University Computer Center

If I play certain cds' on my JVC cd player through my JVC amplifier with
built in digital effects, I get high frequency clicks at certain spots on
the disk out of both speakers. I have reasonable heavy speaker wires hooked
up to Mission speakers which I assume are in good shape (they are new and
don't sound screwed up with all of my other disks).

I dont get the click with the headphones, The clicks only sound once the
cd had been spinning a while. The offending disks are clean with no visible
scratches. The speaker wires are in phase, the clicks cannot be heard in the
surround-sound speakers. Turning on and off the effects (reverb, etc) do not
effect the clicks. I do not get these clicks on the tuner or on the JVC
cassette-deck. The offending discs click a lot once they have spun for some
time and my other discs don't even click once.

There is a crazy pirate in my apartment and he has threatened me with death
if I can't get his "Songs of the Sea" disc to sound good. Thank you in advance.
Xref: sparky rec.audio:13086 sci.electronics:16269
From: kim@Software.Mitel.COM (Kim Letkeman)
Newsgroups: rec.audio
Subject: Re: Golden Ears?
Date: 6 Oct 92 13:32:43 GMT
	<1992Oct6.024047.21236@sol.ctr.columbia.edu>
Organization: MITEL Public Switching, Kanata, Ontario, Canada
In-reply-to: crgoc@orlando.uk.cray.com's message of 6 Oct 92 02:40:47 GMT

In article <1992Oct6.024047.21236@sol.ctr.columbia.edu> crgoc@orlando.uk.cray.com (Gary O'Connor) writes:

|  IMHO Mr Pierce, what do you do in the loudspeaker consulting
|  company, if it's dealing with customers in any way, and loudspeaker
|  recomendations, your company is up shit creek. A more arrogant
|  reply I have rarely seen. Reply's like the one you've given do
|  nothing except discourage open ended discussion.

On the contrary, I thought the original article was pretty silly and
have been dismayed at having to plow through a series of replies, all
of which took the original at face value. Dick at least questioned the
original article's motives.
--
Kim Letkeman	kim@Software.Mitel.COM
Newsgroups: rec.audio
From: bill@bilver.uucp (Bill Vermillion)
Subject: Re: DAT Royalty - Only on blank tape?
Organization: W. J. Vermillion - Winter Park, FL
Date: Tue, 29 Sep 1992 13:59:30 GMT

In article <1992Sep28.161843@trc.amoco.com> znpt01@trc.amoco.com (Norman P. Tracy) writes:

>Paul & Shiv you guys just don't get it. Why on earth would Sony risk
>incuring the wrath of whats left of the American recording industry
>and the Nippon bashing Congress when as owners of the former CBS
>records they get a big cut of the "tax"?  Anybody else notice how after
>the RIAA helped torpedo the launch of DAT the Japanese electroic giants
>started buying up record companies.  This is called covering all the bases,
>hardware and software.  Now Sony Tape can sell you the blank tape or
>MD and the US Treasury will help them transfer the royality tax funds
>to Sony Records.

>Sorry for the tone of this followup but this issue has me rather hot.

What's left of the American recording companies?  The Japanese only
bought what was left after the Europeans had purchased the rest.
Sony's purchase of Columbia, and M(forgot whic Japanese M compnay)'s
purchase of MCA  put all of the major companies under foreign control.

Don't forget that Capitol has been owned by EMI since the late
50's/early 60's as one of the first.  And other were acquired a piece
at a time.   The industry used to be the big 3.  RCA/Columbia/Decca,
and then Capitol came along.   RCA went to Bertlesman many years ago,
Capitol went to EMI long before that.

There is no more "American recording industry".  And the last
manufacturer of American pro-audio recorders was MCI - before Sony
bought them. Otari having sealed the fate of Ampex after 3M had bowed
out earlier.

A good deal of the publishing is also controlled/owned by foreign
interests.  (I mean book publishing, not music)

-- 
Bill Vermillion - bill@bilver.oau.org  bill.vermillion@oau.org
                - bill@bilver.uucp 
                - ..!{peora|ge-dab|tous|tarpit}!bilver!bill

Newsgroups: rec.audio
From: balon@cup.hp.com (Tom Balon)
Subject: Re: Car stereo security
Date: Tue, 6 Oct 1992 19:23:50 GMT
Distribution: rec
Organization: Hewlett-Packard, Cupertino, CA

In article <PBG.92Oct6101148@bob.cs.brown.edu> pbg@cs.brown.edu (Peter Galvin) writes:
>Well, someone just ripped off my "removable" car stereo.  I figured
>the middle of the day in a well-traveled parking lot would be safe.
>And of course it's a pain to carry the large-ish unit.  So, I'm
>thinking about getting one of those removable-faceplate stereos to
>replace it.  My question is, do thieves know that they are useless
>without the faceplate, or do they attempt to steal them anyway and
>only find out later that it is (supposedly) very difficult to get
>replacement faceplates.  Thanks for any help and commiseration...
>
>Mail to me and I'll summarize.
>
>--

	Around here, they usually break into the car and search for
	the faceplate. Folks have a tendency to toss it in the dash
	or under the seat. 

	I gave up on car audio after someone broke into my car, 
	set off the alarm, then popped the hood and started cutting
	all the wires to the battery in an attempt to stop the alarm. 
	When I returned to my car, the alarm was blasting, the hood was
	open, the door was open but the stereo was there ! Amazing !
	Of course they did HUNDREDS of dollars worth of damage to the
	car. After that, I gave up on anything but a stock stereo. This
	was on a main street, under a street light with regular traffic.

	Regards,
	 Tom
From: fkrauthe@vlsilab.ece.uc.edu (Frank John Krautheim)
Newsgroups: rec.audio
Subject: Re: Denon DRM 710 tape deck/Denon in general?
Date: 4 Oct 92 01:39:32 GMT
Article-I.D.: babbage.1992Oct4.013932.16217
Organization: Unversity of Cincinnati, ECE Dept

In article <1992Oct2.201014.27945@Princeton.EDU> hagar@glasses.Princeton.EDU (Paul Hagar) writes:
>>In article <1992Sep30.221041.29563@ms.uky.edu> miles@ms.uky.edu
>>(Stephen D. Grant) writes:
>>>I have heard that Denon makes excellent tape decks. True?
>>>Anyone familiar with the DRM710 in particular?
>>>I was surprised to see the Signal/Noise ratio listed at >75db (Dolby
>C).
>>>I have seen better specs on some other "lower quality" decks.
>>
>>I have the DRM-700,  no problems and I like it a lot.  It passes the
>>direct comparison tests as well as any cassette deck I have listened
>>to.
>>
>I also own a DRM-700. However, I, unfortunately, have NOT
>"[liked] it a lot." About 6 months after I purchased it, I noticed that
>tapes I recorded on it had a high-pitched (TV-like) whine on them, which
>was distracting. I record on TDK SA-X tapes, and haven't been able to
>get rid of the whine even by fiddling extensively with the "Bias"
>control. I have just resigned myself to the fact that I'll have to bring
>the thing in for service. I realize that mine  probably an isolated
>experience, but it's one I thought you should know about.
>
>My motto is "Caveat emptor, always."
>
>GOOD LUCK!
>
>-Paul Hagar (phagar@pppl.gov)
>

I just bought a DRM-710 about a month ago.  So far so good.  It makes
decent tapes and playback of tapes made seven years ago on my Pioneer deck
years ago is exceptional.  I haven't had time to experiment with different
types of tapes and biasing yet since I am still putting together my
system, but so far I have liked what I have heard and played with.

I compared with AIWA ADF-810 and though the Denon to be the superior deck.  I 
think that you will be very happy with the 710.  I have been pleased so far.

John

--
			      ______________		   _
                              )_____________)     ________/ \________
   John Krautheim                       \\       (________   ________)	
				         \\         /   / \_/
   fkrauthe@thor.ece.uc.edu               \\_______/  _/ There's no intelligent 
   University of Cincinnati		 _/ ..  ...    \  life down here.
   Department of Computer Engineering    \_____________/   Beam me up Scotty.
Newsgroups: rec.audio
From: shiv@bnr.ca (Shiv Naimpally)
Subject: MiniDisc sound quality
Reply-To: shiv@bnr.ca (Shiv Naimpally)
Organization: Bell-Northern Research Ltd.
Date: Tue, 29 Sep 92 16:40:06 GMT


"Sony readily admits that ATRAC's [Sony's data compression scheme]
sound quality is below that of CD. Their reserach indicates however that
95 to 98% of the population will be happy with the sound quality."

from Pro Sound News, Sept. 9, 1992, p. 68.
From: j_adams@fc.hp.com (John Adams)
Newsgroups: rec.audio
Subject: Re: DCC and the built in cassette recorder
Date: 2 Oct 92 19:52:50 GMT
Article-I.D.: fc.BvIF83.69
Organization: HP SESD, Fort Collins, CO
X-Newsreader: TIN [version 1.1.4 PL6]

david ricardo (davidric@uxa.cso.uiuc.edu) wrote:
: I am currently looking for a good cassette recorder (3head/HXpro etc.)
: but soon to be released DCC decks have me thinking I should wait
: 6 months to a year. 
: 
: I make lots of cassette tapes for my friends to trade and so forth
: so I am interested in the cassette deck built into the DCC decks.
: 
: Are they cheap units, or are the do the first DCC decks have HX pro
: 3 head, Dolby B/C in the cassette recorder portion?
: 
: Obviously I would use DCC for my own listening and as my friends 
: get their own DCC decks, but the cassette still has a good 5-10 years
: ahead of it at the very least. It's a nice safety valve as someone
: else mentioned and may be one the the key features which makes DCC
: successful.
: 
: Anybody know anything?

For about the same money (maybe less) you can get a high quality analog
unit with Dolby S.  If you believe than analog has a few years left than
go with a better Dolby (which is claimed to be compatible with B/C).

If you think DCC is the wave of the future and you don't care about making
tapes for your friends (or the quality of the analog side altogather) go
with the DCC unit.


..OR...

If quality is everything and you still don't care about your friends and
you'll keep your old cassette deck buy a DAT deck .


John Adams
From: chrisc@gold.gvg.tek.com (Chris Christensen)
Newsgroups: rec.audio
Subject: Re: Designing Crossovers
Date: 2 Oct 92 18:30:27 GMT
Article-I.D.: gold.5369
Organization: Grass Valley Group, Grass Valley, CA

In article <1992Sep30.230858.6934@cbfsb.cb.att.com> 
rprice@cbnewsg.cb.att.com (rodney.price) writes:

>I saw this post today, but I missed the discussion that lead up to 
>it.  I'm interested because I did a master's degree in acoustics, and 
>my thesis involved making acoustical impulse response measurements in 
>rooms, among other things.  A room is going to do horrible things to 
>the spectrum of the sound coming from a loudspeaker, and I'm curious 
>to see how this test equipment might fix the problem.  What sort of 
>test equipment are you talking about?  "Open field" presumably means 
>that you want to place the loudspeaker away from walls, the floor, 
>etc, and that you use a room that is as dead as possible (or perhaps 
>you take the speaker outside).  You play pink noise through it, use a 
>microphone that, we hope, is better than the hoped-for response of 
>the loudspeaker, and look at the result on a spectrum analyzer.

I take the speakers to be tested outside.  The reflections ara minimal.

I place the speakers on a stand and point the speaker up into the
sky.

I then put pink noise through the speaker and monitor via mcalibrated
mic ans 1/2 oct spectrum analyzer.

Dick Pierce's posting about the equipment available should be
considered the correct list of current equipment.

I will sometimes use mt RTA in it's peak hold mode and sweept sine
waves for testing.  

In the near future I intend to use warble tones.

-- 
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.
Newsgroups: rec.audio
From: dbarker@spang.Camosun.BC.CA (Deryk Barker)
Subject: Re: Why switch to CD?
Organization: Camosun College, Victoria B.C, Canada
Date: Tue, 6 Oct 1992 16:43:22 GMT

In article <1992Oct6.064803.25275@news.cs.brandeis.edu> jacob@max.cc.brandeis.edu ( ) writes:
>just a piece of trivia: some mentioned the advantage the CD has over
>a the LP in term of durability. well, i read a few years ago
>in the boston phoenix quarterly (?) electronics supplement there existed
>a "laser turntable" that reads (only black) vinyl LPs with a laser beam.
>of course you can still melt your LPs in the oven if you wish but you can
>do pretty nasty things to you CDs also if you want. the point is a "laser
>turntable" doesn't put an LP to more wear than a CD player does a CD.
>also given that the "laser turntable" reads the depth of the groove optically,
>conceivably one could imagine a coating process whereby you could have your
>LPs layered with a transparent layer of something that would forever render
>them immune to dust as well. the only problem is, according to the boston
>phoenix, the laser turntable exists, its r&d is completed but it is not
>in production.

Actually it *is* in production, by a company called Finial (I think)
although they may have sold out to someone else. It is *very*
expensive (>$10,000) and probably only aimed at broadcast
organisations who want to minimise wear on records. Its sound quality
is reputedly  not as high as conventional high-end turntables.

Deryk Barker, Computer Science Dept., Camosun College, Victoria B.C.
From: kurts@hpnmdla.sr.hp.com (Kurt Strain)
Newsgroups: rec.audio
Subject: Re: Re: Very expensive cables (oh Gawd, when will it end?)
Date: 28 Sep 92 18:50:51 GMT
Organization: Outpost 1T

In rec.audio, DPierce@world.std.com (Richard d Pierce) writes:


>   But the evidence presented is anecdotal. The burden of proof currently
>   rests in your camp. You prove to me, using whatever methods you want, that
>   the effects exist (and I am not saying they don't), and if you are willing
>   to let your evidence undergo the gauntlet of skeptical and impartial
>   inquiry and it survives, you win.


Yeah, and without proof in our favor there are those who wish to prosecute for
failing to prove something works.  And one guy is never enough to prove
anything, we have to take an average of the idiot public, then call the small
statistical difference insignificant.  I guess this is "the gauntlet" you
speak of.

The scientific findings so far as published in magazines like 
"The Sensible Sound", "Audio", and "Stereo Review":  All amplifiers sound
the same in double blind ABX tests, and so do CD players.  Only speakers
make any difference because it measures the grossest distortions.
We're all just supposed to ignore our own experiences and take that 
scientific evidence?   You can, I'll go on without you sorry folks.

Now Dick Pierce may be on the side of good science and find fault in these
findings, which I would hope so if he has anywhere decent equipment and 
ears, but that's not the line that we are constantly fed by the likes
of scientists like Richard D'something-or-other.  I'm glad Dick Pierce
isn't like that, but he's all too rare.  My "jerk scientist" kill file
just keeps growing.

And when you understand the way the tests are performed - there's always a flaw
- it's too nit-picking for us to say so. It's never too nit-picking for the
scientists to wail away at subjectivist's methods.

There are different methodologies.  Standard scientific experiments
for AES and "underground reviewing" for the subjectivists.  Completely 
ignoring any validity in the other side is supreme arrogance and prejudice,
just like between doctors and chiropractors.  Any first year philosophy
class can tell you that.  I guess a lot of people flunked that one.
From: marc@es.ele.tue.nl (Marc Heijligers)
Newsgroups: rec.audio
Subject: Re: MD Price Info
Date: 30 Sep 92 15:59:56 GMT
	<Sep23.174440.77495@yuma.ACNS.ColoState.EDU>
	<1992Sep23.224626.8603@nas.nasa.gov>
	<MARC.92Sep29083852@mamba.es.ele.tue.nl>
	<1ab1rqINNd13@uniwa.uwa.edu.au>
Organization: Eindhoven University of Technology, Eindhoven, The Netherlands.
In-reply-to: scott@psy.uwa.oz.au's message of 30 Sep 92 02:02:34 GMT

In article <1ab1rqINNd13@uniwa.uwa.edu.au> scott@psy.uwa.oz.au (Scott Fisher) writes:


   >Also  A little joke from Sony. A danser showed us how shock resistance a MD
   >player is. The MD was connected to the amplifier by a wire. After swinging a
   >little to hard the wire lost its contact with the MD player, but the music
   >just went on??!!! :-))))))

   Is this a joke "from" or "about" Sony?  Did you see this happen, was this
   on purpose or an accident (embarassment) for sony?

The joke was ABOUT Sony. It was published in the news papers, and it happened
on an exposition in Amsterdam. I haven't seen it myself, but it had enough
publicity on which Sony would have responded immediately if it was not true. 

It happened on Monday, and I was in Amsterdam the next Sunday. We
weren't allowed to ask any questions at the presentation of MD, which made
the credibility of MD even more discussable. Together with the audible noise
in the sound, the increasement of a 3 second buffer to a 10 second buffer (was
3 seconds too little, or did they had to adapt their code scheme?) it will be
hard to believe that Sony will introduce its MD before Xmas. We'll see...


Marc
From: vincent@garnet (Vincent Lee)
Newsgroups: rec.audio
Subject: For Sale: Onkyo CD Player
Followup-To: rec.audio
Date: 1 Oct 1992 21:48:48 GMT
Organization: WSSG
Distribution: world
NNTP-Posting-Host: tmf2mac23.berkeley.edu

I've got an Onkyo CD player for sale if somebody wants to buy it. It's the
DX- 740. It has the optocoupling technology that Onkyo claims isolates
analog and digital sound. Good CD player. I like the programmable calendar
diplay and well designed face. If somebody is intersested give me call at
510-841-4942. Getting rid of it because I want a changer.