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Steven C. Barr(x) wrote:

> As well, Edison experimented with the block-long recording horn
> (apparently unaware that the vital dimensions were those of the
> MOUTH of the horn, as wll as the taper...which enabled Victor
> to offer the logarithmically-designed "Orthophonic" horn...)

Two different things. Exponential horns such as the Orthophonic horn 
were for reproduction, not for recording. Recording generally demanded a 
longer, narrower horn with no flare, whereas the best reproducing horns 
were shorter, with a much wider taper and a flare.  All of which is moot 
because the Orthophonic horn was designed specifically to reproduce 
records which had been made electrically, not acoustically.

Michael Shoshani
Chicago