well, there were early attempts to reverse "mad dog" on a tinfoil
phonograph in 1878, and see what came out...
Unfortunately, the results were not what was expected.
In a message dated 2/4/2014 8:04:19 P.M. Eastern Standard Time,
[log in to unmask] writes:
Some have opined that the voice is of Warner's actress Alice White. This is
the earliest use I know of reversing sound.
Anyone know of an earlier instance?