HDTenEightyP/NetNews huggingface dataset:
From: desmondw@merrimack.edu
Newsgroups: rec.audio
Subject: What is DSP anyway?
Date: 18 Aug 92 19:19:34 GMT
Organization: Merrimack College, No. Andover, MA, USA


     Sorry for my naiveness, but it is a question to which I get a lot of
different answers. My Technics reciever(SA-GA710) has it but doesn't 
mention how to use this function once in the whole manual(or what its
good for). A dealer said it just provides three extra listening
environments(concert hall,stadium,etc) and there should be keys on the
reciever itself to utilize these environments. But my reciever has no
button whatsoever saying DSP or Stadium,Concert Hall, etc. Does my 
reciever have it or not?
                                          Bill
From: MATGBB@LURE.LATROBE.EDU.AU (BYRNES,Graham)
Newsgroups: rec.audio
Subject: Re: strong desire to vibrate room
Date: 19 Aug 92 05:38:15 GMT
Organization: La Trobe University
X-News-Reader: VMS NEWS 1.22

In <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.
Gee, 3 months back I was giving away a subwoofer box and pcb layouts for
an amp and filter: the box is now my work bench...
> Sound reasonable ?  Reasonable sound ?
How are you going to match the level between the s.w. and your main speakers?
What sort of filter? If you mean a simple LR filter, no. In broad terms, if
your current speakers are sealed, you will need a 2nd order filter, if they
are ported, possibly 4th. Or, as suggested elsewhere, use a high-pass
filter as well, but it will interact with the natural roll-off and the design
won't be too simple.
  QUESTION:  How do i feed the stereo
> signal into a mono speaker ?  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 !?
You got it right. 
> 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.  Why ?  Short ?  Bang ?
No, but since bass tends to be mono, there won't be much difference signal...

  Also, does sub-woofer impedance have to be
> matched roughly to that of the 8225's ?
The impedance mis-match may help or hinder the level match: see point 1 above.
  Does a choke filter present its own
> impedance load ?
Not always, it can interact with the following speaker and produce resonances
etc, but it would probably be ok here (excepting comments on filters above).

 (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,
What sort of driver are you planning on using? 12inch ones tend to be very
expensive or pretty useless. I've had success with a 10in Etone driver: they
are in the Sydney 'phone book. There is also a 10" Vifa with nice specs,
but double the price (the Etone is around A$150) from Scan in Melbourne.

Check out recent copies of Electronics Australia: they had a design
for a multi ported s.w. with good measured performance. I think
you will have to get a separate amp to achieve anything worthwhile: you could
get a 100W Mosfet module from eg Jaycar for around $90 + power supply..
or get a 2nd hand amp from the trading post.
> 
>      Barry Manor, Naturist, Neuroscientist, Bicycle-lover              

Graham Byrnes, mathematician, ex Sydney-sider and lapsed bicycle lover
(it rains too much here).
From: jpl1@Ra.MsState.Edu (John Patrick Lestrade)
Newsgroups: rec.audio
Subject: Re: Who dat say dey gonna buy dat DAT?
Date: 19 Aug 92 13:54:24 GMT
Organization: Mississippi State University

trw@spl1.spl.loral.com (Tim R Witort) writes:

>Prerecorded DAT cassettes?
>DAT Decks?
>Blank DAT cassettes?

>-- Tim

Excuse me for my naivete, TIm.  I meant the ability to make digital
copies of my CD's -- by usinga DAT deck and a blank tape.  I wonder when
the consumer pricing of DAT decks will come down and flatten as did
the cassette deck price structure years ago.  (Computer prices 
have not yet flattened!  They still continue to yield more bang for the
buck yr after yr!)
patrick

--
John Patrick Lestrade, PhD                             jpl1@ra.msstate.edu
Department of Physics and Astronomy                    batse::lestrade  (SPAN)
Mississippi State University, MS 39762                 lestrade@msstate.bitnet
Newsgroups: rec.audio
From: fvr@broom.bae.bellcore.com (Frank Ricciardi)
Subject: Re: Speaker positioning question
Organization: Bell Communications Research
Distribution: na
Date: Mon, 17 Aug 92 12:40:32 GMT

In article <1992Aug15.175138.28468@magnus.acs.ohio-state.edu>, ddaye@magnus.acs.ohio-state.edu (David C Daye) writes:
|> I've got a modest stereo set up in a basement rec room, 7 1/2 ' H
|> x 14' W x 22' L.  The speakers are bookshelf types; I moved them
|> out to the corners to max the stereo effect but that seems to be
|> a mistake.  Seems like the low end balance has gone off, presumably
|> being boosted in some narrow range or perhaps select frequency(ies).
|> By the way my music is strictly acoustic (Irish; some classical) so
|> accuracy rather than "effect" is what's most important here.


	You have touched on one of the better debate questions. All of the 
Hi-fi gurus I have spoken to & most of the loudspeaker install guides I've
read specify that they should be located approximately 6 to 8 feet apart, on a
level plane perpendicular to the listener(s), and on the long wall of a 
room rather than the short.  Some even specify a distance from the rear and 
side walls of at least 2 to 2.5 feet.  

	Now you are dealing with bookshelf speakers, so I assume you have them 
against the back wall. A good general rule to follow is to have them be two 
points of an equilateral triangle, and have you, (the listener) be the third.

             Speakers
      ____              ____
     |    |            |    |
      ----              ----






                 _
                |_|

              Listeners

	Some say you should angle the speakers in toward the listening area.
This tends to add more depth to the soundstage.  My best advice is to play 
around with them & find the best results. You'll find that the bass response
and stereo imaging will vary the most as you reposition them.

	Also, articles of furniture, blinds, drapes etc.. can effect the 
response in a sound room.  You also mentioned basement. Does that mean 
cement floor and cinderblock walls? (Yuck) I hope not!!




|> 
|> It's my impression bookshelf speakers should be positioned along
|> a flat wall.  Any comments or generalizations about locating such
|> beasts would be appreciated.
|> 
|> E-mail is fine unless you think a discussion would be appropriate
|> for the group.
|> 
|> Thanks. 
|> David Daye.

-- 
________________________________________________________________________________
"If you got to it and didn't do it, may you never get to it, and do it again"


Frank V. Ricciardi

fvr@bae.bellcore.com
From: marc@es.ele.tue.nl (Marc Heijligers)
Newsgroups: rec.audio
Subject: Re: Sony Mini-Disc Questions/Debate
Date: 21 Aug 92 15:00:43 GMT
	<MARC.92Aug21091602@mamba.es.ele.tue.nl> <25081@castle.ed.ac.uk>
Organization: Eindhoven University of Technology, Eindhoven, The Netherlands.
In-reply-to: sss@castle.ed.ac.uk's message of 21 Aug 92 13:15:19 GMT

In article <25081@castle.ed.ac.uk> sss@castle.ed.ac.uk (S S Sturrock) writes:


   Can't get any wider than having the thing on general release which it
   hasn't been yet.  How many other companies have claimed that problems
   didn't exist only to find that they did?  Meybe I am just being
   pessimistic, maybe I am being realistic.

Like I said, you're not very realistic.

   Read what I said again, the *ANALOGUE* sound is about on average for a 100
   quid deck, nothing about the digital sound, this comment was aimed at those
   who want to buy one and play their old MCs on it as well as DCCs.

Didn't notice... :-(

[Speculation on]
But I guess most people will leave their analogue tapes anyway, because the
superiour sound of the DCC digital sound will lead them to DCC tapes anyway,
just like most people did when they start using CD and are abandoning their
LPs. 

If I buy a DCC recorder I do it for the digital part, not for the analogue
part. I guess most people will do.
[Speculation off]

   It is an ordinary chrome tape, the information is digital yes but the tape
   is the same as a good old analogue chrome cassette but in a different case.

No it is NOT. The magnetic properties are more like video tapes, not like
ordinary chrome cassettes. 

   Yes yes, very old hat, go teach your grandmother to suck a few eggs will
   you please?

Got any problems with your family or what? 

   >
   >To give you a more complete view on DCC, here's a letter of my friend (working
   >at Philips) which he wrote because of a discussion on nlnet (= local net for
   >the Netherlands, on which the DCC is a hot item too).

   Yes, again, very old news, nothing much there which hasn't already been
   bandied around the net.

Well, most things said about DCC are totally speculative. I thought this 
exact information would be usefull to a lot of people. At least more
informative than your reply on my previous message. 

I hope you don't comment on all messages which don't bring 'news' to you.
You'll be a busy guy then. 

Marc
Newsgroups: rec.audio
From: jim@thor.albany.edu (SCHLEMMER JAMES A)
Subject: Looking for info/opinions on an a/d/s cassette deck (C3)
Organization: State University of New York at Albany
Date: Tue, 18 Aug 92 15:45:29 GMT

Hi all.  I'm interested in an a/d/s cassette deck model C3.  I have a
spec sheet on it but have some lingering questions.  First, does anyone
know if this deck has HX Pro?  I can't seem to find it on the spec sheet.
Also, this deck as a couple of unusual features which I was looking for
opinions on:

o the cassette "drawer" similar to that of a CD 
o the 2 speed (regular 1 7/8 ips and 3.75 ips) recording capability
o its 20 lb. weight (i.e. where does it come from?)

also,

o general performance
o approximate model year

Thanks alot for any info.

Jim
From: haack@iscsvax.uni.edu
Newsgroups: rec.audio
Subject: Re: Math problem - pitch control
Date: 21 Aug 92 13:23:59 -0500
Organization: University of Northern Iowa

Yo, Dick, if a half-step represents a ratio of about 1.06, then two half-steps
would be represented by the ratio 1.06*1.06=1.1236.

Joel
From: ahaley@eoe.co.uk (Andrew Haley)
Newsgroups: rec.audio
Subject: Re: Taping from CD question
Date: 19 Aug 92 10:37:38 GMT
Organization: EO Europe Limited, Cambridge, UK
X-Newsreader: Tin 1.1 PL3

fvr@broom.bae.bellcore.com (Frank Ricciardi) writes:
: In article <1992Aug18.140733.1666@ucbeh.san.uc.edu>, vallamn@ucbeh.san.uc.edu writes:
: |> 
: |> Hi !  I have a question about taping from a CD player on to
: |> a Chromium diodide tape.  When I tape from a CD player
: |> ( Sony CDP 241 ) on to a JVC compact integrated stereo
: |> portable ( PC V 88 ) and I find that the tape, which is
: |> a copy, is always a little crisper ( maybe this is a wrong
: |> word ) than the CD itself.  What I mean is, there is more
: |> zing in the tape than in the CD.  Why is this ?  This does 
:    ^^^^
: 
: 	I think what you are experienceing is an unnatural accentuation of the 
: high frequency. Probably due to the fact that you are using a high bias 
: tape in normal position. Recording w/Dolby on and playing back with dolby off 
: often has the same result. 

This might not be the case.  I have a fairly expensive TEAC cassette
deck which has a little high frequency rise with SA tape when the bias
is set at the centre position.  This is easily fixed by adjusting the
bias, but a portable is unlikely to have fine bias control.  Are you
really using chrome tape, or cobalt ferrite "chrome position" tape?
It seems that SA, a cobalt type, needs more bias than the standard
CrO2 setting.  I don't use other types, so I don't know about them.

: |> not happen when I use a normal bias tape.  Is that much
: |> bias added when I use a CrO2 tape ?  How is metal in this 
: |> regard ?

"chrome position" tape needs much more bias than normal tape.  It also
has a different eq curve.  Metal tape needs more bias still, but has
the same eq as chrome.

Andrew.
Newsgroups: rec.audio
Subject: left and right speakers for Pro-Logic
From: evensen@husc8.harvard.edu (Erik Evensen)
Date: 12 Aug 92 10:59:04
Distribution: rec
Organization: Harvard Arts and Sciences Computer Services, Cambridge, MA

I keep getting this mixed up and I'm sure it's been asked and answered
before but for the left and right speakers or a Pro-Logic setup does
one want speakers which are highly directional or more dispersive? I'm
thinking of getting a used set of Bose 901's (I know, I know but I
need the power handling for other occassions) but wonder how they
would fit into a Pro-Logic setup and the side speakers.

Thanks in advance for any help

--Erik
Newsgroups: rec.audio
From: p0p4018@zeus.tamu.edu (PREMTHAMKORN, PRAKIT)
Subject: Re: Passive preamps revisited
News-Software: VAX/VMS VNEWS 1.41    
Organization: Texas A&M University, Academic Computing Services
Date: Wed, 19 Aug 1992 17:10:00 GMT

In article <1992Aug19.000850.23817@verdix.com>, bill@verdix.com (William Spencer) writes...
>In article <16AUG199211011503@zeus.tamu.edu> p0p4018@zeus.tamu.edu (PREMTHAMKORN, PRAKIT) writes:
> 
>>>of passive preamps. 
> 
>>Accoring to my experience, the high frequency roll off seems to be less 
>>problematic in listening than in the paper.  As long as the mismatch is kept to
>>minimal and the cable is short, this will be no problem in most system.
>>
>>IMHO, the major problem with the passive control is the dynamic range.  The
>>dynamic transients sound compressed and lifeless.
> 
>Anyone care to speculate why this (reputably) is? I can start:
> 
>1. The slight high-freq. rolloff is causing this.

Dynamic transients refer to extraordinary amount of sound energy delivered 
within a short period of time (miliseconds).  Slight roll off is not signifi-
cantly responsible to this.  Large portion of sound energy is from midrange down
to bass region.  During the normal passages, most line level sources will do OK
But during those demanding passages, it's just too much for the sources to both
drive difficult load and delivering voltage swing.
> 
>2. A certain amount of distortion is actually desirable. This is why the 
>active preamp is so important to some in increasing the sense of power and
>dynamics. Witness, just as one example, the review of the Sonic Frontiers 
>preamp in the last Spile issue. The reviewer preferred using a tube in it 
>that resulted in measured increases in distortion. It also reduced frequency
>response, without which he considered it too bright.
>
Distortion can sometimes offer euphonic sound to the system.  It has nothing to
do with the dynamic range.  I do agree that while active device may introduce
more distortion (than passive devices) but if it's small enough and overshadowed
by advantages, the active devices are more preferable.

>3. The higher required angular position of the volume control that results from
>absence of gain tends to result in listeners listening at unmatched levels --
>lower for the passive.
> 
>4. Power amps don't load the passive control with a linear resistance,
>resulting in distortion.
> 

I have no comments on these two.

>bill s

Regards
Prakit
From: bruno@broue.rot.qc.ca (Bruno Majewski)
Newsgroups: rec.audio
Subject: ADCOM ACE-515 defective?
Date: 17 Aug 92 21:10:21 GMT
Organization: Groupe de Recherche Operationnelle en Telecommunication (ROT)
X-Newsreader: Tin 1.1 PL4

Greetings.

Something might be wrong with my set-up and I don't know if it is a real
problem or not. Before calling in the cavalry and possibly making an a**
of myself, I prefer to ask here.

This is my current setup, just in case the answer lies here:

CD player:         Nakamichi CD player 4
tape deck:         Denon DRM-510
tuner:             used Akai (I don't remember the model number...)
integrated amp.:   ARCAM Delta 60
speakers:          Energy 3.1e (on stands)
cables:            for speaker  : "cheap" Monster Cable (the translucid one)
                   interconnects: what came with the equipment, except
                                  a MonsterCable between the CD player and
      				  the amp (I don't remember the model here
				  either).

One month ago, when I turned on my tape deck, I heard a very distinctive
"click" through the speakers, even if the CD was the selected source.
I presumed at the time that it must have been a spike going from component
to component through the power bar ( a Curtiss Ruby); if the power bar did
not isolate each plug, it was better to buy something that would.

So I went out and bought an ADCOM ACE-515, which is supposed to do that.

After plugging everything, I tried to see if switching on the tape deck could
still be heard through the speakers (i.e. "the click"): no.

Ah, what a relief, no more problem - so I thought.

Last week, during a good shower, a spike shook my system like if the ACE was
not there (the CD went bonkers and the amp cut off).  Two days after, I
noticed to my upmost horror that by touching the ACE's power cord I could 
hear a more or less loud ...er... well, the sound that comes out of the radio
or the TV when someone uses an electric drill in the house (sorry, I don't
remember the word in english), no matter how the volume is set.

So I looked to see if it the power cord that was pulled from the socked, if
it was improperly seated - no, it was still secured; no electrical arc
there...
The only explanation I can see is that the ACE's power cord was stepped on,
but I don't see any visible dammage no where...

And worse, the "click" I mentionned earlier returned... 

So, netters, what could cause this "arc-like" sound? Could it be:
  a) that the ACE was dammaged by the spike?
  b) that the ACE's power cord was crushed?
  c) or what?


Worriedly yours,

Bruno Majewski

p.s.: someone mentionned that the "click" is not a real problem, it's just
      that my amp is not filtering it... could it be true?
From: sbhattac@wissel.GBA.NYU.EDU (Shankar Bhattacharyya)
Newsgroups: rec.audio
Subject: Re: Oops, I mean Stereo Exchange (was Re: Also try Stereo Warehouse)
Date: 19 Aug 92 01:14:08 GMT
Distribution: na
Organization: NYU Stern School of Business

In article <FOX.92Aug18122813@graphics.nyu.edu> fox@cs.nyu.edu (David Fox) writes:
>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.

What is interesting about Stereo Exchange (on Broadway, at Houston,
that's the place, right?) is that they have an exceptional stock of used
equipment, from mid-priced equipment up into the stratosphere. Krell, Audio
Research, Quad, so on and so forth.

I don't have any affiliation with them either, except as a very occasional
customer. But people I know have done lots of business with them. They are
a respectable business.

I could be very happy with the used equipment displayed in their window on
almost any day.

- Shankar
Newsgroups: rec.audio
From: slee@eng.auburn.edu (Sanguk Lee)
Subject: SONY R7100 CD5
Keywords: ORDER INFO. IS NEEDED
Reply-To: slee@eng.auburn.edu
Organization: Auburn University Engineering
Date: Thu, 13 Aug 1992 01:39:27 GMT

This is my first try to post mail on this group!
Let me say "Hello" first.
I'd like to know how to order specific audio rack system R7100 CD5 from SONY.
If anybody knows about it, let me have it
In addition to this, if any of you have about difference between R7100CD5 and R7200CD5
except for power difference.
Thanks in advance

		Sanguk Lee



Newsgroups: rec.audio
From: bower@pecan.cns.udel.edu (Tyson Bower)
Subject: Re: cd player shutdown
Organization: University of Delaware, Newark
Distribution: na 
Date: Sat, 15 Aug 1992 18:18:05 GMT

I quote from page ten of my Pioneer PD-M530 owner's manual.

"Caution:
 Do not unplug the power cord or do not turn off the power with
 an audio timer during playback, as this could result in damage to
 the disc."


Newsgroups: rec.audio
From: oconnor@upsilon.kpc.com (Mike O'Connor)
Subject: Re: Address of SONY and PIONEER?
Reply-To: oconnor@kpc.com (Mike O'Connor)
Organization: Kubota Pacific Computers Inc.
Date: Thu, 20 Aug 1992 20:58:45 GMT

SONY
1-800-288-SONY 

--
Michael D. O'Connor  Kubota Pacific Computer  oconnor@kpc.com
Newsgroups: rec.audio
From: ted@dgbt.doc.ca (Ted Grusec)
Subject: Re: PSB Stratus Gold/MAS Revelation OPINIONS SOUGHT
Organization: The Communications Research Centre
Date: Thu, 20 Aug 92 15:15:15 GMT

In article <fb#nh4g.mccrate@netcom.com> mccrate@netcom.com (Joe McCrate) writes:
>henken@ocf.berkeley.edu (Matthew J. Henken) writes:
>
>>First, looking through Stereophile's Recommended Components list from April,
>>I noticed that there was a speaker in the Class-B list which had a price
>>way out of line with the rest of the list ($2000/pair).  That was the PSB
>
>However, I thought the speakers looked slightly klutzy.  Maybe the same
>talented speaker designer also specified the appearance of the cabinet, 
>about which he had somewhat less talent?

What's klutzy about a straightforward, no-nonsense medium-tall cube?
-- 
==========================================================================
Ted Grusec    Communications Research Centre    (Govt. of Canada, DOC)
 3701 Carling Ave., Ottawa, Ont.K2H 8S2, CANADA  Internet: ted@dgbt.doc.ca
  Compuserve: 73607,1576  (613) 998 2762   Fax (613) 993 8657
From: sikorsky@ee.ualberta.ca (Mike Sikorsky)
Newsgroups: rec.audio
Subject: Comments on B & W 804 Matrix needed
Date: 13 Aug 92 22:59:44 GMT
Organization: University Of Alberta, Edmonton Canada

I'm considering the purchase of a pair of 804 matrix speakers, and would
appreciate good/bad comments on them from anyone.

From what I've been told, they are meant as economical 801's...with a very
nice response...is this true?

Just what kind of $$$ should I be expecting to pay?
Newsgroups: rec.audio,rec.video
From: conty@cbnewsl.cb.att.com (Conty-kun)
Subject: Re: Pro-Logic Receivers (STRAV1070/D1S/etc) Summary!
Organization: AT&T Bell Laboratories
Date: Mon, 17 Aug 1992 15:43:33 GMT

In article <1992Aug10.113546.4369@bb1t.monsanto.com>, rghoff@bb1t.monsanto.com writes:
> In article <bobl.6xdn@bobsbox.rent.com>, bobl@bobsbox.rent.com (Bob Lindabury - SysAdmin) writes:
> > In article <1992Aug07.163943.24595%jim.uucp@wupost.wustl.edu> mike%jim.uucp@wupost.wustl.edu (Mike Suter) writes:
> >> Thank you all for the many responses to my inquiry for Pro-Logic
> >> A/V receiver recommendations.
> >>

Aiigh!  I come back to r.video after several months to ask about the very
same thing, and what happens?  Someone posted a summary, and the article
has already expired in my site!

Could someone please e-mail me the original article?  Thanks!

-- 
			    E n r i q u e  C o n t y
			The Incredible Man-with-no-Life
			      jester@ihlpl.att.com
		    Disclaimer: You're not dealing with AT&T