Strictly speaking, a Theremin uses a pair of antennae that act as capacitors in a specific R/C circuit. Looking at [aritrakdebnath2003]’s MIDI THEREMIN, we see it works differently, but it does play ...

This includes connecting power and video signals using VGA, DVI, HDMI, or DisplayPort (recommended) cables. If you're unsure, confirm the monitor's make and model (usually from a sticker on the back) ...