thumb|right|Triadex Muse
thumb|View from the side, showing the triangular shape of the case
The Triadex Muse is an early sequencer-based digital synthesizer designed by Edward Fredkin and Marvin Minsky at the Massachusetts Institute of Technology in 1969. The unit has sliders to control the tempo of the master clock, the pitch of the instrument, and the output volume; no control over the timbre of its single square wave oscillator is provided, as the instrument's creators intended it as a proof of concept and compositional tool more than an instrument in its own right.
A Muse was a featured exhibit for years at the Museum of Science in Boston, playing a single continuous melody that the staff dubbed "Museum Musings".