Which instrument did In Lingua Mortua use that is similar to the Chamberlin but could be mass-produced more effectively?
In Lingua Mortua:  The music can be described as a mixture of 1970s progressive rock and black metal, and vintage instruments like the Mellotron, Chamberlin, Minimoog, Clavinet and Hammond organ are used frequently, as well as saxophone, bass clarinet, steel guitar, Ludwig drums and Rickenbacker bass. Mellotron: The Mellotron is an electro-mechanical, polyphonic tape replay keyboard originally developed and built in Birmingham, England, in 1963.
i don't know