Introduced into Rock by Mike Pinder of the Moody Blues and, he claims it was he who introduced it to the Beatles, who first used it on Strawberry Fields Forever. Later used by King Crimson, Led Zeppelin, Genesis, The Rolling Stones, David Bowie, and so on.
Here's some Mellotron music https://www.youtube.com/watch?v=ajGdNTFxRy0"]Mike Pinder describes how the mellotron works - YouTube https://www.youtube.com/watch?v=TUcfB5Whp4I"]Paul McCartney shows the Mellotron - YouTube (Ignore the Japanese the English will appear) https://www.youtube.com/watch?v=Jb2Lw-0gFtA"]King Crimson Robert Webb Mellotron v2 - YouTube
