Re: Bose stereo question

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <199903300410.EAA29343@smtp.amb.org> ti@amb.org (Ti Kan) writes:

> DNR (also known as DNL for "dynamic noise limiter") existed well before
> the mid 80s.  I had a Philips cassette deck in the 70s that had it.
> It's basically a dynamic low-pass filter that varies its degree of high
> frequency attenuation based on the signal amplitude.  You are probably
> confusing DNR with "dbx" which is a true compander (compression/expansion
> of the amplitude) device.

Many years ago I built a comprander.  It used a tape recorder 'magic eye'
(remember those) and a photocell.

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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