HDTenEightyP/NetNews huggingface dataset:
From: jj@alice.att.com (J. Johnston)
Newsgroups: rec.audio
Subject: Re: How can different digital cables sound different?
Date: 8 Jan 93 15:41:34 GMT
Article-I.D.: alice.24575
Reply-To: jj@alice.UUCP (jj@alice.att.com, the grouch)
Organization: NJ State Home for Bewildered Terminals

In article <C0I0Jq.IJM@iphase.com> grima@iphase.com (Gary Rima) writes:

>>    Most commercial circuits I know of a 0 is at least 0.7 volts or
>>    more...as that's the saturation of silicon.

>Apparently the commercial circuits you know don't include anything based on
>CMOS logic, which is the basis for most modern LSI circuitry.  0.7 volts is
>not the "saturation of silicon".  Rather, it is the saturation voltage (base-
>emitter junction voltage) of a silicon junction transistor.  A (silicon)
>MOSFET transistor as used in CMOS circuitry typically swings almost
>rail-to-rail (from about 0.2 volts to about 4.8 volts) as opposed to the 0.7
>to 2.8 volt swing which is more typical of TTL style logic.

Now, I'm really confused.  Most of the (bipolar) transistors in MY lab
seem to show a Vbe of about .7 volts at saturation, but oddly enough,
and right in line with the physics of the situation, the Vce is about
.4 volts.

Most of the TTL sitting there has substantially less than .7 v at
zero.  Almost like it's one Vce saturation voltage, which
isn't really very surprising when I look at the circuitry
shown in the old TI handbook.  Looking at the TI handbook,
most of the "0" levels are stated to be typically .2V, max .4.

Most of the CMOS has very low values, once it's settled.  I mean
VERY, it's lower than .2  Of course, the CMOS also has a quite
different threshold of 0/1, as well, but why confuse the issue
any more than it's already confused?

Handy things, voltmeters. Handy things, scopes. Y'all might try
one sometime.
-- 
Copyright alice!jj 1992, all rights reserved, except transmission by USENET and like facilities granted. Said permission is granted only for complete copies that include this notice. Use on pay-for-read services specifically disallowed.
---------
Member HASA - Athiest Scum Division
"Extremism in the defense of liberty is no vice" - AuH2O for President
From: creasyg@ava.bcc.orst.edu (Glen Creasy)
Newsgroups: rec.audio
Subject: Info on Sony receiver wanted
Date: 4 Jan 93 16:54:42 GMT
Distribution: na
Organization: Biological Computing Consortium, OSU
NNTP-Posting-Host: ava.bcc.orst.edu

Howdy folks!

I recently bought a Sony STR-AV1070X from Silo.  It was a demo model,
so I didn't get anything but the unit and the remote.  The sales-
lady said that I could call Sony and order a manual for it.

Does anyone have an address to write to or a phone number to call
to order an owner's manual for it?

Also, if anyone has any comments about this model, I'd be interested
in hearing them.  I have it hooked up for ProLogic, and it sounds
pretty good (..vast understatement :-).  

One thing I'm slightly concerned about is some clicking noises coming
from the surround speakers when I adjust their volume.  One click for
each push of the volume button.  The graphic equalizer also jumps 
all the way across the band when I do this.  Are these noises normal?

Also, there is a bit of hiss coming from the surround speakers (rears
and front).  Is this a normal byproduct of the ProLogic electronics?

Thanks in advance for any comments/info you have!

-glen


-- 
			                 --creasyg@cgrb.orst.edu--
  --"We are on a mission with no purpose,
  -- in itself, I can accept that."      -Cmdr. W. Riker  ST:TNG
Newsgroups: rec.audio
From: schuster@panix.com (Michael Schuster)
Subject: Re: Used bass subharmonic synth's available
Organization: Panix Public Access Internet & Unix, NYC
Date: Thu, 7 Jan 1993 14:06:31 GMT

In article <1993Jan6.122813.1082@cmkrnl.com> jeh@cmkrnl.com writes:
>Last December, someone posted a note here looking for either a dbx "Boom Box"
>or an Audio Control subharmonic synthesizer.  

It was me!

>There is a used equipment dealer here (San Diego) who has one of the dbx units
>and (last time I was there) several of the Audio Control units.  They're a 
>little over $100.  He will do mail (phone) order.  
>
>	Ross Audio-Video Exchange
>	(619) 560-5500

Thanks, I'll give them a call.

-- 
_______________________________Mike Schuster________________________________
NY Pub. Access UNIX/Internet: schuster@panix.com | 70346.1745@CompuServe.COM
The Portal (R) System: schuster@shell.portal.com | MCI Mail,GEnie: MSCHUSTER
Newsgroups: rec.audio
From: dave@scrc.umanitoba.ca (Dave McCrea)
Subject: Re: polarity inversion
Organization: Physiology Department, University of Manitoba
Date: Fri, 8 Jan 1993 21:32:32 GMT

In article <1993Jan6.163258.8936@walter.cray.com> daw@cray.com (Dave Wright) writes:


>First off let us get some terminology correct. Polarity and phase are two
>different metrics with different measurement symptoms, different units,
>and different audible effects. YES THEY ARE BOTH AUDIBLE ON ANY AVERAGE
>SYSTEM. You do not need a high end sytem or a recording studio system to
>hear the effect.

 - stuff deleted -
>Now for the effects. Several in the group have described some of the
>effects that polarity can have. Recording Engineers have known for a long
>time that polarity can have positive and negative effects. I for one was
>mixing a song where the vocals completely dropped out by a polarity problem
>that caused the sound to completely cancel. Making sure all your audio
>equipment is properly polarized is critical. The description about vocals
>is very true. 

- more deleted - 

>Even on stage, polarity can be a big problem. With sound combining all over
>the place, comb filters are everywhere. These are what cause feedback.
>Feedback can be controlled better if everything is properly polarized.
>There are companies that make click boxes to check polarity and keep those
>nasty comb filters under control.
>Dave Wright,

Of course what you are taking about on stage and during mixing to stereo is 
cancellation of portions signals that are added together. When signals 
with out of phase components are added there will be cancellation. In mixing 
a song this is bad since mono playback on AM radio will sound strange and 
some musical parts may disappear. On stage, cancellation produced by 
reversing a speaker connection can be a useful tool in preventing feedback 
when all else fails.

On the subject of absolute polarity, consider the drummer sitting on the 
stool "behind" (bias emphasized) the drums. Do the self-declared audiophiles 
here really think that the drummer is getting a worse sound than the 
microphones in front of the set? Yes I know that much of the sound heard 
is from room reflections but the initial transient will be the 
direct signal and of different "polarity" on both sides of the (kick) drum. 
I doubt that you could convince any musician about the prefered polarity of 
music. 

Absolute polarity os a topic best left for discussion after the fourth 
scotch.

Dave McCrea.
|  dave@scrc.umanitoba.ca         Dept. Physiology
|  Vox: 204-788-6770              University of Manitoba 
|  Fax:204-786-0932               Winnipeg, MB.  R3E 0W3, Canada
Newsgroups: rec.audio
From: garyp@rmtc.paramax.com (Gary Palangian [RMTC/ISP])
Subject: Re: WANTED: Indoor FM antenna advice
Organization: Paramax Systems
Distribution: usa
Date: Mon, 11 Jan 1993 20:15:19 GMT

Hey Now Wayne,

    You probably get a lot of Jane jokes, heh?

    I like my Terk fam antenna ($35 locally).  It also comes
in a bodacious array of colors.

    In L.A., where I used to live, paying $4 more a month
got you fm over your cable line but a lot of the stations
were broadcast in mono.  I have no idea why.

    In Broomfield, where I now live, fm is broadcast over
the cable line as part of the service.  But I already had my
fam it weems to work fine so I haven't even tried the
cable.  I have a splitter somewhere around... Maybe I should
hook it up and report the result.

    Party On....


        Gary P.
From: krj@netsun.cl.msu.edu (Ken Josenhans)
Newsgroups: rec.audio
Subject: Re: Nakamichi 700 Cassette Deck replacement
Date: 6 Jan 93 21:01:49 GMT
Organization: Michigan State University
NNTP-Posting-Host: netsun.cl.msu.edu

In article <27613@sybase.sybase.com> herb@sybase.com (Herb Lison) writes:
>I purchased a Nakamachi 700 deck a very long time ago, in the mid-70's,
>and used it to tape a large record collection....   I've made
>the round of the various stores with tapes and have been unable to find
>an equipment combination that makes my tapes sound as good as the old
>equipment did.
>
>I suspect this is because the cassette decks in the stores are not as
>good as the machine I had.  I could be wrong about this, but a friend
>of mine has another Nakamachi 700 and the tapes sound just fine with
>his equipment.

Nakamichi and the rest of the world have a substantial disagreement
about how to do tape equalization.  (At least, they did in the 70's and 
the early 80's; I bought my third & last Nakamichi deck in 1983.)
I'm not entirely clear on how this happened;
the best explanation I've encountered is that a 
"standards" organization produced a written "standard" and "standard"
test cassettes which did not match up.  The vast majority of cassette
deck manufacturers went with the tape standard, but Nakamichi followed
the written standard.

The obvious manifestation of this is that Nakamichi-recorded cassettes lose
a lot of their high frequency sound when played back on a non-Nakamichi
machine.  In the other direction, non-Nak tapes sound slightly bright
when played back on a Nakamichi, but most users don't object to a little
extra brightness.

Nakamichi seems to have a good claim that they are "right" and everyone
else is wrong, but this is scant comfort to anyone using cassettes in a
heterogenous environment. 

Since compatibility with his existing cassette library is of paramount 
importance to Herb, he should start by checking current Nakamichi decks.
If Nakamichi has abandoned their position on equalization, he can look for 
early-80's decks in the used market, and they should do what he needs.

Last time I was in the cassette market, Harmon-Kardon and Tandberg were
following Nakamichi's lead on equalization, so those brands may be
worthwhile for Herb to investigate.

Meanwhile, as a Nakamichi user of 15 years standing, I'm planning on 
getting a high-end Sony deck later this year, strictly due to the 
equalization compatibility issue.   Today my cassettes have to play in 
2 car stereos, 2 boomboxes and a Walkman, and in those applications I am
fed up with the equalization disparity.   If 1993's Nakamichi decks 
match the de facto equalization standard, please let me know.

-- 
--Ken Josenhans
    Internet: 13020KRJ@msu.edu      Bitnet: 13020KRJ@msu
Newsgroups: rec.audio
From: eomiya@borland.com (Elliot Omiya)
Subject: "Stubby" RCA cables avail?
Summary: Wonder if short RCA plugs are avail
Originator: eomiya@genghis.borland.com
Keywords: audio cables
Organization: Borland International, Inc.
Distribution: usa
Date: Mon, 11 Jan 1993 20:26:34 GMT

A friend of mine built a stereo cabinet that is just a little bit too short for
his components and is wondering if short ("stubby") cables or cables that are
built at a 90 degree angle are available.  I said I didn't know but I bet 
someone out in net land does.  How 'bout it?

-=<EHO>=-

Newsgroups: rec.audio
From: ketil@edb.tih.no (Ketil Albertsen,TIH)
Subject: Re: CD/LD jitter: I certainly do get it! (Was: Kerry doesn't get it...)
Organization: T I H / T I S I P 
Posting-Front-End: Winix Conference v 92.05.15  1.20 (running under MS-Windows)
Date: Wed, 6 Jan 1993 15:41:10 GMT

In article <1993Jan5.174159.2909@porthos.cc.bellcore.com>, gfl@herahera.cc.bellcore.com (lenahan,grant f) writes:

>Some perspective - I beleive the poster referred to someone's
>earlier (and silly) assertion that jitter's only result would
>be a bit error.  Hense, in that logic, no bit errors, no jitter.

You misunderstand. The DAC receives a bit stream, or word stream
but that is the essentially the same. The bit values count, and
if they were not the ones sent into the cable, then you have the 
wrong bits, or bit errors. If you get the right bits all the time,
then fine. But jitter may cause bit errors, if you do not have a
big enough buffer between the cable and the DAC. (That is, if you
every now and then have to insert or remove a sample, because the
buffer was empty or overflowed.) Bit errors are more than noise
changing a 0 to a 1 or the other way around - insertion or removal
of bits are also bit errors, as seen from the DAC.

You don't need a cable and physical jitter to judge the acoustic effect 
of that kind of errors, if you simply have a RAM that can hold a
sufficient amount of digitized sound. Inserting an element in an
array should be very simple. I could do that very easily - even at
CD sampling rates with my PC and Soundblaster card, but the quality
of the DAC at the SB may be *slightly* less than perfect... :-)
From: moskowit@panix.com (Len Moskowitz)
Subject: Re: woofer advice needed
Organization: Panix Public Access Internet & Unix, NYC
Date: Mon, 4 Jan 1993 17:00:26 GMT

Dick Pierce writes:

>No, the standard foam surround replacements will, in all likelyhood, not
>work. These drivers (or later versions of them) used polyproylene cones,
>and there are damn few adhesives that will work properly on PP, none of
>them are usable by us mere mortals who don;t happen to have heated
>surround presses at home. 

There's a company that advertises in Speaker Builder that offers
the proper adhesives and PP replacements cones.  I don't have a magazine
handy but I think they're called Speakerworks or something of that ilk.

-- 
Len Moskowitz
moskowit@panix.com
Newsgroups: rec.audio
From: hyc@hanauma.jpl.nasa.gov (Howard Chu)
Subject: Re: Sony STR-790 *problems*
Organization: SAR Systems Development & Processing, JPL
Date: Thu, 7 Jan 1993 08:35:29 GMT

In article <1993Jan5.002211.25096@galileo.cc.rochester.edu> hm002b@uhura.cc.rochester.edu (PRIMUS SUCKS!) writes:
>In article <1iaeh5INNqr5@usenet.INS.CWRU.Edu> ch218@cleveland.Freenet.Edu (Erik A. Horn) writes:
>>I have noticed most of the people who say they love their
>>STR's have had them a short time.  I had mine about 4 months
>>when the memory started to malifunction, and two months later
>>the 'P' light kept coming on. So you may not be out of the 
>>water yet.  Either that or Sony finally fixed the problem
>>which would be great.  A lot of 'non-hifi' types trust
>>the Sony name, and it would be nice if they delivered what
>>they claimed too.  I have noticed that a fan does help,
>>so if you notice your reciever does run hot, you may
>>wish to put a fan on it.. Hope you guys had better
>>luck then some of us others.

>I hope mine doesn't get messed up since I have one of the first 1090's.
>actually I have owned mine since August 8th so it has been 4 months not one
>problem, yet!

On the other hand, the obvious problems of the xx70 and xx20 lines seemed
to be apparent from the beginning. (Mainly, noise in the rear surround
speakers, and visible noise on the spectrum analyzer when using the remote
volume control.) My 1070 is still acting up (been meannig to take it back
for its second trip to Sony Service, yeehah, haven't done it yet), which
is a drag. Looking at the schematics in the service manual, it seems that
the major problems (shorts & such) stem from the fact that a single power
supply drives both the display and the volume motor, as well as the CPU.

Maybe Sony fixed their power supply problems in the xx90 series. Ya never know.
(Kinda wonder; there was a several year gap between the introduction of the
1020 and the 1070, but only 1 year to the xx90 series. Came out awful quick,
it seems...)
-- 
  -- Howard Chu @ Jet Propulsion Laboratory, Pasadena, CA

There's a rough border between genius and insanity, but I'm a dual citizen.
Newsgroups: rec.audio
From: wayne@ultra.com (Wayne Hathaway)
Subject: WANTED: Indoor FM antenna advice
Reply-To: wayne@ultra.com (Wayne Hathaway)
Organization: Ultra Network Technologies
Distribution: usa
Date: Sat, 9 Jan 93 01:33:54 GMT

I think this was discussed recently but I was too slow to pick up on
it; apologies.  My question relates to INDOOR FM ANTENNAS (antennae?).
In particular, our house is what is known around here as "over the
hill," and FM reception is spotty at best.  I bought a Radio Shack
"dipole" antenna (otherwise known as a T-shaped chunk of twin-lead)
and it helps, but (a) is still marginal, and (b) looks like hell
hanging on the wall.

Is there anything else I should try?  I saw a little "powered FM
antenna" at Good Guys the other day, but I'm somewhat skeptical of
such things.  And we do NOT (currently, at least) have any sort of
outdoor antenna, since we are hooked to cable.  (Anything I can do
with the cable connection for FM reception, he asks hopefully?)

Thanks for all ideas!

    Wayne Hathaway               domain: wayne@Ultra.COM
    Ultra Network Technologies     uucp: ...!ames!ultra!wayne
    101 Daggett Drive             phone: 408-922-0100 x132
    San Jose, CA 95134              FAX: 408-433-9287
From: hm002b@uhura.cc.rochester.edu (PRIMUS SUCKS!)
Newsgroups: rec.audio
Subject: Mirage MCC-R Speaker.
Date: 12 Jan 93 17:14:01 GMT
Organization: University of Rochester (Rochester, NY)

In article:
 
Does anyone out there own any Mirage speakers? I have never heard of them
before a few days ago. Are they decent speakers? I am looking into getting
the MCC-R, any help would be appreciated, thanks!
From: Matt.Ion@p106.f7040.n153.z1.ship.wimsey.bc.ca (Matt Ion)
Sender: UUCP@ship.wimsey.bc.ca
From: palane@iastate.edu (Paul A. Lane)
Newsgroups: rec.audio
Subject: Re: Stereo Review's critical judgement
Date: 6 Jan 93 03:16:30 GMT
Organization: Iowa State University, Ames IA

Previously written:

>> It's like buying a Compaq 486 whatever vs. buying a quality clone. Once
>> the system is set up, SOFTWARE is SOFTWARE and will perform identically
>> on both computers.  The guy with the Compaq is getting a better casing
>> and potentially a better warranty. He's got a computer that's better
>> built, but NOT one that performs better.

>There's a serious flaw in this logic... the digital "quality" of $50 vs $500
>CD players may be the same, but (to follow your analogy) there's a world of
>difference between a Compaq 486 with a PC speaker for sound and CGA video, and
>a cheap 286 clone with a SoundBlaster and SVGA.  There may (note MAY) be a
>WORLD of difference between the quality of the ANALOG audio sections of $50
>and $500 CD players, and THAT'S where you start to notice the difference.

We should compare apples and apples. Presumably the poster referred to a
Compaq 486 vs a generic 486. There are actually some very significant
differences, but they are measurable differences. Not the case when compar-
ing different CD players.
From: chrisc@gold.gvg.tek.com (Chris Christensen)
Newsgroups: rec.audio
Subject: Re: Surround speakers--Out of phase vs. tr
Date: 11 Jan 93 19:52:54 GMT
Organization: Grass Valley Group, Grass Valley, CA

In article <lkrdnvINNiht@exodus.Eng.Sun.COM> klein@napali.Eng.Sun.COM writes:

>By far most theatres are not THX certified.  Non-THX certified theatres
>vary widely in sound quality and results are not guaranteed :-) as
>Chris notes.

I believe for a theater to be THX certified requires a site visit by
the great man himself!  Tom Holman
-- 
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: klein@napali.Eng.Sun.COM (Mike Klein)
Newsgroups: rec.audio
Subject: Re: Surround speakers--Out of phase vs. tr
Date: 8 Jan 1993 17:16:47 GMT
Organization: Sun Microsystems, Mountain View, CA
Distribution: world
Reply-To: klein@napali.Eng.Sun.COM
NNTP-Posting-Host: napali

In article 5794@gold.gvg.tek.com, chrisc@gold.gvg.tek.com (Chris Christensen) writes:
>In article <lkmhgeINN8i5@exodus.Eng.Sun.COM> klein@napali.Eng.Sun.COM writes:
>>Achieving B in THX is typically done by having each surround speaker
>>actually radiate the sound in opposite directions (front and back) out
>>of phase with each other.
>
>Equipment that bears the THX symbol only meet Tom's specifications.
>The use of bi-polar or di-polar or that ever description of that type
>of speaker system doesn't make it THX.  It just meens that Tom OK'ed
>the idea.

OK, I should have been clearer and said something like:

	"Most surround speakers I have seen that are THX certified radiate
	the sound in opposite directions out of phase.... "

Apologies for a quick writeup.

>I recently saw Aladdin in a theater that was set-up for Dolby Stereo.
>The theater had side only speakers.......

By far most theatres are not THX certified.  Non-THX certified theatres
vary widely in sound quality and results are not guaranteed :-) as
Chris notes.

Thanks for the info!
---

Mike Klein		{wherever}!sun!klein || mike.klein@Eng.Sun.COM
Sun Microsystems, Inc.	Mountain View, CA
From: ah335@cleveland.Freenet.Edu (Richard Banks)
Newsgroups: rec.audio
Subject: Audio preamp circuits.
Date: 7 Jan 1993 21:03:35 GMT
Organization: Case Western Reserve University, Cleveland, OH (USA)
NNTP-Posting-Host: slc4.ins.cwru.edu



I design and build low power audio preamp circuits mainly
analog signal processors for use with a guitar.

Any suggestions, help, tips, ideas, theories, or practical advice,
on how to cut out noise will be very much appreciated.

Thanks.
From: dhukill@esprit.prime.com (Dave Hukill)
Newsgroups: rec.audio,rec.video
Subject: Re: Selecting an LD Player
Date: 5 Jan 93 17:21:59 GMT


 While on the subject of LD Players, has anyone had any experience with the
new Sony MDP-K5 Laser/CD/Karakoke player? I've got some literature from Sony,
and a retail price ($999), but have not seen it mentioned anywhere.

advTHANKSance



Dave Hukill <dhukill@esprit.prime.com>