HDTenEightyP/NetNews huggingface dataset:
From: SteveSgt@torrent.sj.ca.us (Steve Sergeant)
Newsgroups: rec.audio.pro
Subject: Re: Tascam DA-60 DAT
Date: Fri, 22 Jan 93 06:51:27 PST
Organization: Steve Sergeant's Home...
Reply-To: SteveSgt@torrent.sj.ca.us
X-Mailer: uAccess LITE - Macintosh Release: 1.6v2


In article <1993Jan21.204159.7052@src.honeywell.com> (rec.audio.pro), olson_rick+.mn65_src@ms.mail.src.honeywell.com (Richard A. Olson) writes:
> <1993Jan21.204159.7052@src.honeywell.com>
> Hello,
> 
> Has anyone got any info on the new Tascam DA-60 DAT deck?  I picked up
> the  basic Tascam info flyer at my neighborhood Guitar Center, but have
> not seen any unbiased tests on the unit yet.
> 
> I would also like to know if anyone has a list price on the DA-60.
> 
> Thanx!

I was told $5,500 at the NAMM show.  As far as tests go, I don't think anybody
has one yet.


- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Steve Sergeant            Internet:  SteveSgt@torrent.sj.ca.us
San Jose, California         Radio:  KC6ZKT [@N0ARY.#NOCAL.US.NA]
(408) 945-0395               GEnie:  STEVSERGEANT
Audio Engineering, Music, Macintosh, Bicycles, Backcountry, Japan
From: hjv@phil.ruu.nl (Hendrik Jan Veenstra)
Newsgroups: rec.audio.pro
Subject: Re: Tape deck bias
Date: 26 Jan 93 17:09:54 GMT
Organization: Department of Philosophy, University of Utrecht, The Netherlands

weaver@kuttner.sfc.sony.com (Eric Weaver) writes:


>In article <1993Jan25.155115.14789@city.cs>, lionel@cs.city.ac.uk (Lionel Tun) writes:


>|> That is fair enough, in fact I tried it a bit, but what if
>|> you're tone deaf? Is there a rough rule of thumb that I can
>|> bear in mind?

>Watch the playback on a scope.  Adjust for the best looking sine-wave.

Hmm... does it matter when you're tone-deaf...?  :-*


--
Hendrik Jan Veenstra    hjv@phil.ruu.nl  *  How can I save my dreams
Dept. of Philosophy                      *  in the nightmare, in the flood
University of Utrecht                    *  But I try.
The Netherlands                          *
Newsgroups: rec.audio.pro
From: theo@physics.su.OZ.AU (Theo ten Brummelaar)
Subject: Re: Tape deck bias
Organization: School of Physics, University of Sydney, Australia
Date: Tue, 26 Jan 1993 01:26:33 GMT

In article <1993Jan25.155115.14789@city.cs> lionel@cs.city.ac.uk (Lionel Tun) writes:
>In article <1993Jan23.221351.9680@ultb.isc.rit.edu> cms2839@ultb.isc.rit.edu (a.stranger) writes:
>>In article <1993Jan22.185157.22090@city.cs> lionel@cs.city.ac.uk (Lionel Tun) writes:
>>>There is a bias knob on my church's analogue tape deck (Sony TCK570)
>>>but I have always set it in the middle. What can I do with it? 
>>>
>> ----------EXPLANATION DELETED-----------
>>
>That is fair enough, in fact I tried it a bit, but what if
>you're tone deaf? Is there a rough rule of thumb that I can
>bear in mind?
>
If you are tone deaf `white noise' is the best thing to use as a reference.
Even tone deaf people can hear changes in this hissing noise. The easiest way
to get white(ish) noise is to use an FM tunner set away from any station.

	Theo
From: bill@verdix.com (William Spencer)
Subject: Re: Motorola Mid-Hi Piezo horn driver
Organization: Verdix Corp
Date: Fri, 22 Jan 1993 23:09:27 GMT

button@jug.Eng.Sun.COM (Russ Button) writes:
>Motorola makes a mid-range/hi-frequency horn driver that mounts onto
>an EV-8HD horn.  I need buy one but can't seem to find a dealer that
>carries them.  

I'm not too sure about using the EV horn with it, it's nothing special. 
Motorola makes a big plastic horn that may or may not be any better. I have
some. Not too bad, but spitty in the upper trebles. Also the horn is long,
so getting an adequate time/phase alignment in a typical application is
unpredictable. They're availiable from Parts Express.

I'm going to tell you about a horn I think is better though. It's a
dynamic constant directivity radial horn that Parts also sells. It's made by
MG, although the catalog may not say so. Also there are bad specs in my
catalog. Efficiency is 99 dB and power is more like 50 watts. It can be used
down to about 1.5 K and is has a smooth curve that rolls off gradually above 
10K. It also costs about $12.

Unfortunately, I doubt such a wide dispersion device would be anay good arrayed
for larger systems. It can work well in vocal PA and monitors with the right 
protection.

Oh yeah:
Parts Express
340 E First St.
Dayton Ohio 45402
800 338 0531



Bill s
Newsgroups: rec.audio.pro
From: tchannon@black.demon.co.uk (Tim Channon)
Subject: Re: Audio Transformers - question
Reply-To: tchannon@black.demon.co.uk
Distribution: world
X-Mailer: cppnews $Revision: 1.20 $
Organization: null
Date: Thu, 21 Jan 1993 00:26:43 +0000

> I have a question regarding audio transformers.  I'm thinking
> about "line level" transformers as opposed to power amplifier
> output transformers, but I suppose that the discussion will be
> applicable to both.  
> 
> stuff deleted

I would feed the transformer with a good square wave and adjust the load for 
the best waveform. This sometimes gives surprising results and I've had cases 
where 600 ohm rated transformers which were suspected of not really being 
good at that load showed optimum results with 1k5 load.

The most common critical thing about output transformers is the low frequency 
saturation. You may see something like +12dBm @ 40Hz 1% third harmonic (note 
that this is loaded). There are major variations in this spec.

Anouther one is equivalent series impedance where you can load the output 
until the signal halves. Typically 50 ohms but varies. 

Anouther one is wierd linearity versus level caused by mixed spec laminations 
which is done to try and meet some particular spec. In this case distortion 
may peak at *less* than full output level.

Winding techniques can include bifilar which tends to give superb results but 
may give poor safety characteristics.

Anyway, a good big one beats a good small one and torroids are usually the 
very best. There are exotic core materials if you are prepared to pay the 
price, few do.

As a coda: it is possible to reduce the output impedance of a given 
transformer by using feedback which includes the current in the primary. It is 
difficult but is an interesting technique. This is of course if auxillary 
windings are not available. On the bench I have persuaded a 150 ohm series 
impedeance transformer to show 5 ohm! The snag is of course the voltage drive 
required which becomes huge.

  TC. 
    E-mail: tchannon@black.demon.co.uk or tchannon@cix.compulink.co.uk
From: button@jug.Eng.Sun.COM (Russ Button)
Newsgroups: rec.audio.pro
Subject: Re: Motorola Mid-Hi Piezo horn driver
Date: 25 Jan 1993 19:23:04 GMT
Organization: Sun Microsystems, Inc.
Distribution: world
Reply-To: button@jug.Eng.Sun.COM
NNTP-Posting-Host: jug

In article lltpdoINNelb@appserv.Eng.Sun.COM, button@jug.Eng.Sun.COM (Russ Button) writes:
>
>Motorola makes a mid-range/hi-frequency horn driver that mounts onto
>an EV-8HD horn.  I need buy one but can't seem to find a dealer that
>carries them.  
>
>I used to buy them from McGee Radio in Kansas City,
>but I can't get through to them.  When I call the number that directory
>assistance gives me I get a constant busy signal.  Operator assistance
>tells me that the line is either off the hook, or is non-functional.
>I've also heard that McGee is now out of business (which could explain
>the bad phone number...).
>

As it turns out McGee is still in business.  They were having their 
phone system worked on last week.  You can get their phone # from
directory assistance.   They are now called McGee Electronics.

Russ Button
"The report of my death was an exaggeration."
From: chrisc@gold.gvg.tek.com (Chris Christensen)
Newsgroups: rec.audio.pro
Subject: Re: Motorola Mid-Hi Piezo horn driver
Date: 27 Jan 93 17:42:13 GMT
Organization: Grass Valley Group, Grass Valley, CA

In article <lltpdoINNelb@appserv.Eng.Sun.COM> button@jug.Eng.Sun.COM writes:

>Motorola makes a mid-range/hi-frequency horn driver that mounts onto
>an EV-8HD horn.  I need buy one but can't seem to find a dealer that
>carries them.  

Parts Express 1-800-338-0531

Motorola PN KSN-1086

Parts express PN 270-085  $25.30 QTY 1-9 $23.95 QTY 10 and up.


-- 
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.pro
From: schwab@ucunix.san.uc.edu (Paul Schwab)
Subject: "Dawn" Speaker System
Organization: University of Cincinnati
Date: Thu, 21 Jan 1993 22:42:22 GMT

Hi:

Has anybody out there ever used a "Dawn" speaker system?  I've seen them
in music stores, and basically they consisted of a subwoofer, and a
couple of small (really small) mid-high end units.

I thought this system sounded great, but it's kind of hard to tell in
a store, listening to a CD how it would sound with a band.

-Paul
-- 
Paul Schwab                   		- Paul.Schwab@UC.Edu
Computer Engineer    	      		- schwab@ucbeh.BITNET
University of Cincinnati      		- pschwab@spanky.ece.uc.edu
Electrical and Computer Engineering	- uunet!uceng!pschwab
From: mortiz@hpprdeb.prd.hp.com (Miguel Ortiz)
Date: Fri, 22 Jan 1993 13:20:15 GMT
Subject: **** HELP!  CD MFG. INFO
Organization: HP Puerto Rico Manufacturing Operation
Newsgroups: rec.audio.pro

I am doing a research in CD manufacturing as well as tape duplication. Does 
anyone can provide sources of information about technologies, equipment, costs,
vendors, media suppliers, etc. ?


Appreciate your help in advance,



Miguel Ortiz
E-mail: miguel@hpprdot.hp.com
Phone - 809-882-6437
From: chrisc@gold.gvg.tek.com (Chris Christensen)
Newsgroups: rec.audio.pro
Subject: Re: Altec 604s as stage monitors ?
Date: 22 Jan 93 17:54:06 GMT
Organization: Grass Valley Group, Grass Valley, CA

In article <FPaeXB4w165w@tfsquad.mn.org> mike_d@tfsquad.mn.org (mike diack)
writes:
>Anybody ever tried it - what sort of box did you put 'em in &
>did the musos like them. Its just that i have a few unemployed

If my memory serves me (and at times is doesn't...) the 604's are
fairly low power speakers.  To get the spl up on the speakers in
control room monitor situations an additional 15" speaker was added.
I believe that the cabinet also needs to be pretty good sized to
support the speaker correctly.

You might consider selling the 604's and buying Radian's.  They have
the power handling that stage monitor applications _usuallu_ require.

-- 
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: gfl@herahera.cc.bellcore.com (lenahan,grant f)
Subject: Re: Digital critics - sampling argument is nonsense
Organization: Bellcore, Livingston, NJ
Date: Thu, 21 Jan 93 13:42:01 GMT
Summary: wrong frequency

(Cevin M Zellers) writes:
> I recently witnessed another case of the analog sentimentalist trying
> to use the 'sampling' argument to lodge a complaint against Digital.
> 
> critics are pressing this argument and misleading the public, due to their
> ignorance of the Nyquist Sampling theorem. All of you digital skeptics, 
> please note that CD's capture ALL frequencies up to 44.5 KHz, reproducing
> them faithfully (butter than vinyl, I argue). Frequencies above 44.5 KHz
> don't matter, that's far above the threshold of hearing anyway :)

Right and wrong.

The sampling rate itself is very likely adequate, because it captures
all freqs up to 22.05 kHz (44.1 / 2).  Actually, it is all _below_
22.05 kHz, if you think carefully (not inclusive).

The only valid criticism is that by making the theoretical limit
only 10% more than the generally accepted hearing limit of 20 kHz,
filter design is made more difficult, and limits choices to higher
order (generally less phase correct) re-construction filter
designs.  "Oversampling" (still hate the term Max :-)), raises
the out of band noise by the OS multiple, and somewhat alleviates
this limitation.

Of course, there are still many implementation problems with
this youngish technology, especially at $200-400 consumer levels,
and acceptance of the theorey does not imply perfect products.

Grant
From: lstowell@pyrnova.mis.pyramid.com (Lon Stowell)
Newsgroups: rec.audio
Subject: Re: Digital critics - sampling argument is nonsense
Date: 23 Jan 93 01:20:21 GMT
Reply-To: lstowell@pyrnova.pyramid.com.pyramid.com (Lon Stowell)
Organization: Pyramid Technology Corporation

In article <shetline-220193135652@128.89.19.90> shetline@bbn.com (Kerry Shetline) writes:
>
>The reasoning is not bogus. It is both easily measurable and demonstrable
>with listening tests. This idea of 'euphonius distortion' really seems to
>bug you a lot, <lpfan--name deleted>. 
   

   For the benefit of those LP persons unfamiliar with a dictionary,
   the offishul Webster definition:

     EUPHONIUS: adjective. "pleasing to the ear".

     "sweet-voiced and musical" is part of the root definition.
From: kirk@hpcc01.corp.hp.com (Kirk Lindstrom)
Date: Fri, 22 Jan 1993 15:59:57 GMT
Subject: Re: testing again
Organization: Shredding the water of SF Bay, HP-OCD
Newsgroups: rec.audio

>Testing again.  Sorry.
>--
>Aamir Qazi
>qazi@csd4.csd.uwm.edu
>--- why should I care?  I'd rather watch drying paint.
----------

OK, your test passed.  Now tell us if you prefer Bose or Apogee as well
as CD vs LP?

Kirk out
From: d89marho@und.ida.liu.se (Martin V. Howard)
Newsgroups: rec.audio
Subject: Re: Advice for the budding Speaker Designer
Date: 24 Jan 93 14:11:56 GMT
	<1993Jan19.185520.1826@bnr.ca>
	<D89MARHO.93Jan20135356@odal1.und.ida.liu.se>
	<1993Jan21.025759.24213@organpipe.uug.arizona.edu>
Organization: CIS Dept, University of Linkping, Sweden

In article <1993Jan21.025759.24213@organpipe.uug.arizona.edu> tom@afthree.as.arizona.edu (Thomas J. Trebisky) writes:

   If you are refering to P. 51 in the Fourth Edition, I believe there
   is a typo, but not a major one.  You can derive the Formula from the
   more general one in Thiele's paper by plugging in pi*r**2 for Sv.
   What I get is:

	   Lv = 1.463*10**7 * R**2 / (Fb**2 * Vb) - 1.698 * R
						    ^^^^^

   Dickason has 1.463 for the second number -- other than this, the
   formula seems fine, looks like the 1.463 just was echoed into the
   later part of the formula twice.  But this is only 0.5 inch or so for
   a R=2 port, no big thing.  BTW this last correction subtracted is for
   the end effect on the vent.  Make sure the units are all inches.


OK, so far so good.  Now, if I have two ports, I can calculate which sized
single port their combined surface area equals, but what about length?
Do I just jam the radius of one of the ports into the formula above,
leaving the other parameters the same, or should they be modified in
some way?  Dickason makes no mention of this (at least not that I've
found).

/mvH

--
Programming isn't a science,        | Foo:    mvh@lysator.liu.se
it's an art.                        | Bar:    d89marho@und.ida.liu.se
Why is it called common sense,      | Who:    Martin V. Howard
when so few possess it ?            | Voice:  Int +46 (0)13 261 283 (GMT + 1h)
Newsgroups: rec.audio
From: gallian@tellabs.com (Doug Gallian)
Subject: LOOKING FOR PING CHEN
Organization: Tellabs, Inc. Lisle IL
Distribution: usa
Date: Mon, 25 Jan 1993 14:59:43 GMT

I've tried to email to Ping Chen about MIT cables for sale with no luck. 
If you're out there please call me at 708-955-3062 thank you.  Doug
From: lstowell@pyrnova.mis.pyramid.com (Lon Stowell)
Newsgroups: rec.audio
Subject: Re: What happen to dbx?
Date: 27 Jan 93 20:29:51 GMT
Reply-To: lstowell@pyrnova.pyramid.com.pyramid.com (Lon Stowell)
Organization: Pyramid Technology Corporation

In article <CB.93Jan26144247@tamarack13.timbuk> cb@tamarack13.timbuk (Chris Brewster) writes:
>
>I was once a DBX booster, but I found that it tends to fall short of its
>promise, because the playback machine has to be adjusted exactly like

>On that subject, do any current preamps allow control of
>the dynamic range?
>
     Yes.  The biggest advantage of the old 3BX was that you could
     separately compand the bass midrange and treble.  This was
     great for avoiding woofer damage, yet preserving the impact of
     rim shots.

     The Sony TA series digital preamps include both compression and
     expansion, done digitally.  The implementation is less than
     optimal in that it is global across the frequency band rather
     than possibly being tied to the parametric EQ.   It also doesn't
     allow separate adjustment of the slicing level and compansion.
     Unjudicious use can easily drive the preamp into digital
     clipping with truly horrid results.   

     However, used judiciously, mild compression can create the
     illusion of "more information" on those CD's which have been
     recorded with no compression or gain riding...and help avoid
     clipping on wimpy amplifier/speaker combinations.  The other
     advantage is that if your equipment can tolerate it, you can
     expand the dynamic range of tapes, LP's and AAD disks.

Newsgroups: rec.audio
From: bstdenis@mailbox.fwrdc.rtsg.mot.com (Brian St. Denis)
Subject: Re: Linn Kalidh Speakers
Organization: Fort Worth Research and Development Center, Motorola, Inc.
Date: Mon, 25 Jan 1993 19:13:38 GMT

In article <C1F3C7.BBn@hpuerca.atl.hp.com> sfk@hpuerca.atl.hp.com (Steve Katz) writes:
>I have been searching for speakers in the <$1500/pair range for a while
>now.  I have listened to the Klipch, Infinity Kappa's, Paridigm monitors,
>Apogee Centaur Minors, Mirage M series, etc.  I had finally cut my search
>down to two speakers - the Theil CS 1.2 (~1300), and the Vandersteen 2ce
>(~1300).  Both speakers are outstanding in their class.  I was just about
>ready to buy.
>

Any reason for not listening to the B&W 640's?  They are about $1400 list
(here in Ft. Worth).



-- 

---------------------------------------------------------------------------
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: dave@news.ccutah.edu (Dave Martin)
Subject: Re: THX w/o THX equipment?
Reply-To: dave@csulx.weber.edu
Organization: University of Utah Computer Center
X-Newsreader: Tin 1.1 PL3
Date: Sat, 23 Jan 93 06:08:17 GMT

You can probably come pretty close as long as you actually use a THX
certified decoder.  This will get you the decorrelation and X-Curve
re-equalization.  You may or may not also want to consider di-polar
rear channel speakers.  Also, the decoder will generally get you the 80hz
subwoofer crossover if you want to use it.  Any amp that can produce suffient
volume and handle wide dynamic range should work, use what you like the sound
of.  You also might want to watch out for timbral mis-matches between your
front speakers and your rear ones.  Front speakers are supposed to have
wide horizontal dispersion and narrow vertical.

I suspect that there is a lot of equipment out there (especially amps)
that meet THX specs, but has not bothered (or dont want to pay) to obtain
THX certification.  Also, not everyone agrees with the THX method of
doing things.  You should use what you like.

dave@csulx.weber.edu (ignore the header address, its probably wrong)
From: sture@lulea.trab.se (Sture Jonsson)
Newsgroups: rec.audio
Subject: Re: Comments on analog music
Date: 25 Jan 93 07:31:53 GMT
Organization: Telia Research AB, Aurorum 6, 951 75 Lulea, Sweden
X-Newsreader: TIN [version 1.1 + PL8]

Kirk Lindstrom (kirk@hpcc01.corp.hp.com) wrote:
: >Why do I like it more ? Well, it sounds more like my recordplayer (not only
: >the Linn CD, but also other brands). So what did they do ? Put a lot of
: >LP distorsion on the discs, or a special 'analog distorsion' circuit in the
: >players ?
: >
: >Sture
: ----------
: Well, what I think has happended is you might have gotten some CDs that
: were mastered properly.

Well; yes I also listened to some new CD:s, but as I said: Most of the discs
were discs that I had bought 7 or 8 years ago, which sounded AWFUL when compared
to their LP counterpart. Now with the new CD players, they sound a lot better
(or less bad....); some are even 'listenable'.

Therefore my conclusion is that the new CD players have improved VERY MUCH
over the old ones, which of course also let's me believe that the old players
were B-A-D, and that the 'pure perfect sound forever' marketing hype was
pure BS. And no, it didn't take this long for me to find that out, but the fact
that new players seem better is just another evidence.

LISTEN and enjoy,
Sture
From: randyd@csd4.csd.uwm.edu (Randall Elton Ding)
Newsgroups: rec.audio
Subject: Re: Speaker vent placement question
Date: 22 Jan 1993 22:16:51 GMT
Organization: Computing Services Division, University of Wisconsin - Milwaukee
NNTP-Posting-Host: 129.89.7.4

In article <C19v5p.IzJ@usenet.ucs.indiana.edu> wakeland@silver.ucs.indiana.edu (ray s wakeland) writes:
>also see why a designer of a larger floor-standing speaker would put the 
>port in back.  For example, the drivers of my B&W DM640's cover most of the 
>front surface of the speaker, so it is probably just easier to put the port 
>in back.  This speaker is not meant to go near the wall.
>
>I am mistified, however, by the Energy 22.3's.  These speakers have TWO 
>ports, one in front, below the woofers, and one in back in the center of the 
>speaker.  Why would they do this?

I have experimented with different port positions on the subwoofers I built
over the years and have not found any differences.  The only thing that 
seemed to make a difference after I got the box and port volume correct was
the room placement.

On a bookshelf speaker I could see there would be a preference to place
ports on the front, other than that I have not observed anything unusual
about any particular port placement with only one exception...

I built a set of stage speakers (combination horn/bass reflex design) which
were used in a DJ setup dance hall, designed by Altec Lansing.  The ports 
on these speakers were just as big as the throat of the horn.  It seemed as
if the further away you got from the speaker, the more the sound seemed to comme
from the port ( I had a buddy cover up the horn and port alternately for the
test ).  So in some special cases it makes a big difference where the port
goes.

Randy.

Newsgroups: rec.audio