Which instrument did In Lingua Mortua use that is similar to the Chamberlin but could be mass-produced more effectively?
In Lingua Mortua: In Lingua Mortua is a Norwegian band formed by Lars Fredrik Frøislie in 1999 at Hønefoss, Norway. Mellotron: The Mellotron is an electro-mechanical, polyphonic tape replay keyboard originally developed and built in Birmingham, England, in 1963. Mellotron:  It evolved from a similar instrument, the Chamberlin, but could be mass-produced more effectively.
i don't know