Re: [ARSCLIST] Dolby B in software

["joe@xxxxxxxxxxx" <sergei01@xxxxxxxxxxxxx>]

Open reel tapes could have been recorded by someone with an out board
encoder. Advent made a number of models in the 60s. I had one until it
developed severe hum. I wish I had kept it now.

Joe Salerno
Video Works! Is it working for you?
PO Box 273405 - Houston TX 77277-3405
http://joe.salerno.com
----- Original Message -----
From: "Parker Dinkins" <parker@xxxxxxxxxxxxxxxxx>
To: <ARSCLIST@xxxxxxxxxxxx>
Sent: Friday, April 18, 2003 4:30 PM
Subject: Re: [ARSCLIST] Dolby B in software


> on 4/18/03 2:52 PM, Aaron Z Snyder at aaron@xxxxxxxxxxxx wrote:
>
> > Has anybody ever written the Dolby encode/decode algorithm in
Windows-based
> > software?
>
> I don't think Dolby Labs would be happy about that, nor would it be a
> trivial matter to accomplish.
>
> > The question arose when a friend of mine told me about some orphaned
Dolby
> > B-encoded tapes. These apparently are reel-to-reel and without
calibration
> > tones. Granted, without the calibration tone, decoding of the tapes
would be
> > pure guesswork. However, a computer-based program would at least allow
> > non-real-time experimentation so that a plausible reference level could
be
> > established.
>
> Dolby B was designed for use with audiocassettes. Dolby A was designed for
> open reel tapes, and the hardware is available in the market. If you have
> Dolby B open reel tapes they were probably created to dub cassettes.
>
> ---
> Parker Dinkins
> MasterDigital Corporation
> CD Mastering + Audio Restoration
> http://masterdigital.com