First Electrical Recordings.

[Olorin67]

the 1924 Paul Whiteman R.I.B was acoustic, the later 1927 re-recording was electrical. I think Victor switched during 1925, some other companies switched a bit later. a few pioneers, such as marsh labs in Chicago did it earlier, but were not as good sound wise. Victor's first electric recoding were made with Western electric division of bell labs/Phone company