Darrell Acree wrote:

>The recording of Brahm's voice is on a famous old 1889 Edison cylinder
>which was very badly deteriorated when it was dubbed on disc in 1935. ...

I think if you do further research that you will find that this voice was
not Brahms.  There have been some diaries and letters documenting the event
that state that the voice was not Brahms at all, rather the voice of the
sound recordist.

Kevin