Mellotronists

Beat Instrumental magazine March 1976 issue:  

>Another amazing feature of the Mellotron is it's ability to
incorporate any tape whatsoever into it's workings. In other words,
the owner of a Mellotron Mk 5 can programme it with virtually
anything he wants, from tapes of his own voice to sound effects and
string sounds.

What's this?  ^

Clayton Bigsby