’Moe Sax uses the same pitch-control principal as the original ’moe, which is a clarinet. This involves a flexible magnetic strip positioned over an open slit running the length of the instrument. Normally the strip angles up and away, but when you press it down it covers some portion of the slit, depending where you press. This is like covering tone holes in a standard instrument, except that you can press anywhere in the pitch continuum, or glissando all you want. The magnetic strip seals leaklessly over the steel sides of the slit when pressed. ’Moe sax uses a tenor sax mouthpiece. The wooden body functions as a conical bore, though it’s square in cross-section.