[78-L] Fake stereo

[Don Cox]

On 01/03/2013, Michael Biel wrote:

> I have all three of the Toscanini electronic stereo LPs and they
> worked out pretty well, considering the mono source. They are not
> anywhere near as convincing as the two REAL stereo recordings that
> Toscanini made of course. The description of using comb filtering is
> not at all anything like what you are calling "L/R delay". The purpose
> was not time delay distinctions but tonal filtering. These three
> Toscanini LPs were done with care and do move some instruments towards
> the left and some to the right, leaving a balanced overall frequency
> response on both channels. But because there are phase differentials
> introduced by the comb filtering, they cannot be combined back to
> mono.
> 
I remember way back building a little box to give more treble on one
channel and more bass on the other. (Of course a two-channel equaliser
could do the same, but I didn't have one.)

It worked quite well for small group jazz, but not for other records.

Regards
-- 
Don Cox
doncox at enterprise.net