Bob Cain wrote:


Mike Rivers wrote:

Not knowing what the original sounded like, it's hard to guess the
change, but thanks for the example. It sounds a bit like incoherent
stereo, which the original may well have been considering the era of
the recording. Did you do this with a math program?


Mike, here is an 8k, 32 bit float Hilbert transformer

'Where is "here"', you may well ask. Sorry, I was in a
hurry to get out the door and forgot the link:

http://www.arcanemethods.com/Hilbert.wav

Note that this filter has a fixed 4096 sample delay plus the
90 degree phase shift at all frequencies. It is not
accurate at the extremal low frequencies and the extremal
high frequencies and that is a consequence of it being a
finite length approximation to the real thing.


Bob
--

"Things should be described as simply as possible, but no
simpler."

A. Einstein