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Re: [ARSCLIST] Dolby B in software

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
----- 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
> > 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
> > B-encoded tapes. These apparently are reel-to-reel and without
> > 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
> > 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

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