DAT-heads Digest #835

Contents:
  Re: using md5sum (pwking)
  Landmine Concerts ("Blair Frodelius")
  Re: Analog Tape Transfer & Dolby Removal (Mikkel Breiler)
  ISOphish ("Paul Thomson")
  Re: No Dolby plug-in (Rich Mays)
  WTB: AKG 393's (Dano)
  ISO: Sonic Youth Chicago 8-15-03 (chrisfeldott@comcast.net)


From: pwking <sleepypedro@yahoo.com>
Subject: Re: using md5sum
Reply-To: sleepypedro@yahoo.com
Date: Sun, 17 Aug 2003 04:01:40 -0700 (PDT)

> From: Brian Dowling <panther@hereintown.net>
> Subject: Fw: FLAC Help
> Date: Sat, 16 Aug 2003 01:21:29 -0400
> 
> How does one make a MD5 Signature from a FLAC16 or
> FLAC 24 file?

open a DOS shell.

'md5sum *.flac > flac.md5'

more questions?  here's documentation:

http://hegel.ittc.ukans.edu/topics/linux/man-pages/man1/md5sum.1.html

=====
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
web:  http://home.nyc.rr.com/pedroworld
AIM:  sleepypedro
A Bear Ate My Parents!
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From: "Blair Frodelius" <BlairF27@twcny.rr.com>
Subject: Landmine Concerts
Date: Sun, 17 Aug 2003 08:23:17 -0400

I'm looking for CDR's of the Landmine Benefit shows from 1999-2002 which had
Bruce Cockburn as a guest.  I have hundreds of Cockburn tapes and CDR's to
trade.  Drop me a line if you're interested.

Blair :)
====================================================================
The OzProject:  http://OzProject.egtech.net
Out of the Box:  http://home.twcny.rr.com/ootb

"If I can’t be a good example then I'll just have to be a horrible warning."





From: Mikkel Breiler <mibm@tiscali.dk>
Subject: Re: Analog Tape Transfer & Dolby Removal
Reply-To: mibm@tiscali.dk
Date: Sun, 17 Aug 2003 15:52:34 +0200

>From: Tom McCreadie <mccreadi@xs4all.nl>
>Subject: Re: Analog Tape Transfer & Dolby Removal
>Date: Sat, 16 Aug 2003 21:35:47 +0200
>
>Adding my 0.0185 Euro to remarks by Mikkel, Dennis and Rich in #833:
>
>>[Mikkel]
>By 'characteristic curve' are you talking about transfer function or =
just a
>frequency response playback equalization curve? There is no single, =
magic
>bullet, playback curve, but rather a whole family of equalization curves
>whose frequency response depends on how far the music signal departs =
from
>the absolute reference Dolby level.

Exactly for this reason I oversimplified the answer, for most people =
dealing with
noise and possible Dolby, they are trying to do something about a noise =
level that
was either very high and no Dolby or raised to be annoying by Dolby. Now =
the question
was not how to properly un-Dolby the recording but rather how to fix any =
tape in such
condition using software. And that is not easy, but cutting corners and =
auditioning
both the tape and the sampled version of it will get you far if you are =
critical
about what you do. Rather than sampling one tape find settngs that work =
and repeat
that operation for 200 more tapes. Not all the tapes nesecarily need a =
harsh or soft
treatment, some may be best left alone. And each should be made to sound =
like
something you want to listen to, as otherwise it is not worth the trouble=
 in the
first place.
Now the best thing to do is to use a good well maintained deck with Dolby=
 so you have
the option of using the decoder or not. So get a deck - pick up, lend, =
steal, buy -
use any combination that is legal where you are ;).
I just picked up a Denon DR-M24HX at 30 Kroner ($4.5) at a local =
fleamarket this
morning. This deck has Dolby B, C and MPX filter. Dual Capstan (and tape =
monitor when
recording) Heads are hardly used.
=46or an additional 30 Kroner ($4.5) I bought another deck, a Pioneer =
CT-450 fitted
with Dolby B and C, I then cleaned both and added a new belt to the =
Pioneer and both
are performing like they were 6 months old. The Pioneer is 1984-ish I =
cannot tell how
old the Denon is, but not as old as the Pioneer. Maybe 1987-ish.
So if it possibly you have Dolby recordings it is possible to pick up =
Dolby decks at
a fleamarket at a very reasonable cost. Chances are that Dolby B in =
operation is
enough to tell wether the tape actually was recorded with it, as the =
sound becomes
convoluted when applying Dolby decoding to a recording that wasn't =
encoded.

> For this reason, the above equalization
>advice for playback of Dolby C recordings on Dolby B decks is too =
simplistic.=20

OK, get a deck.

>[Incidentally, having a snatch
>of reference level tone on each tape had other advantages: For example,
>cassette-cassette copying - now there's making silk purses out of sows'
>ears <g> - was cleaner when you bypass the Dolby on both decks and just
>align the tones. Avoiding a decode-encode cycle is akin to our DAT =
practice
>of cloning via s/pdif rather than going DA-AD] =20

That makes a lot of sense, but this assignment was not blessed with a =
reference level
tone ;(

>Perhaps the original poster shouldn't sweat it if he has high level rock
>stuff, since the Dolby's are hardly doing anything under those =
conditions,
>but classical music might need more rigour.=20

I seem to recall Waynes tapes were "mainly 80's goth" ;)

-breiler



From: "Paul Thomson" <pthomson@gorge.net>
Subject: ISOphish
Reply-To: <pthomson@gorge.net>
Date: Sun, 17 Aug 2003 11:06:44 -0700

I have this great tape:
09/30/95 Shoreline - Mountain View, CA NakCM300s+AT4071
but I only have the first set.
I'd like to find the second set. Does anyone have this tape?




From: Rich Mays <richmays@comcast.net>
Subject: Re: No Dolby plug-in
Reply-To: richmays@comcast.net
Date: Sun, 17 Aug 2003 14:25:31 -0400

> "Gary Davis" <g@hoxnet.com> wrote:

> Also, It is all but impossible to tell if a tape has no Dolby, B, or C 
> simply by listening.  (DBX, on the other hand, is notable for the 
> extreme compression and likely pumping of hiss, if played back 
> with no decoder).

Depends on the level-- if it hovers around 0vu then yes, but quiet
sections will clearly display the NR signature. Careful listening will
reveal the differences between types A, B, C, or dBX. Also whether or
not the cassette deck employed HX, a feature that increased headroom by
varying the amount of bias current as the level approached 0vu. At least
this feature did not depend on any processing on playback.

and from Tom:

> And suppose you try
> to help this plugin out of its quandary by transferring - after the event,
> but under identical conditions - a sine test tone of say OdB on the meters
> of your cassette deck (which has now been brought back up to spec), you'll
> still require to know the relationship between that tone and the Dolby
> level pertaining to your tapes. And - shudder - some tapes may have been
> made on other decks. 

I wrongly stated that Ampex Operating Level was 0vu on cassette. 0vu for
cassette should be 200nW/m (as Tom said), NOT Ampex Operating Level at
185nW/m ("the gospel for open reel" until the advent of later tape oxide
formulations which gave more headroom on machines with enough bias
current). But even if you had a "Dolby plugin" you would then enter into
the debate over whether 0vu= -14dbFS or some other level, bearing in
mind that if the output from tape exceeds the 0dbFS level (digital zero)
you have rather nasty-sounding clipping. Further, if the levels are not
correct you will not decode properly, and the farther off you are the
more out of whack the frequency response becomes.

The answer to the original question remains-- experiment and do what
sounds best to you! 

Rich

-- 
Rich Mays
Sonare Recordings
<http://www.sonarerecordings.com>



From: Dano <dan@thejamzone.com>
Subject: WTB: AKG 393's
Date: Sun, 17 Aug 2003 13:01:28 -0700 (PDT)

I'm looking to buy a pair of AKG 393's in excellent condition
(matched if possible). Let me know if anyone has a pair for sale.

Peace
Dan




From: chrisfeldott@comcast.net
Subject: ISO: Sonic Youth Chicago 8-15-03
Date: Mon, 18 Aug 2003 01:38:10 +0000

Did anyone get this awesome show from Goose Island Fest Friday nite?  Lots to 
trade....

Peace
Chris


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