Z

Zero Level
This is a standard reference audio level used when discussing relative levels. Commonly the zero level is chosen to be 1 mW. This corresponds to 0.775 volts rms across a 600 Ohm resistance.

Zither
Musical instrument composed of strings mounted upon a resonate frame, strings can be plucked with fingers or struck using small mallets.

Music is the fourth great material want, first food, then clothes, then shelter, then music.”
Christian Nestell Bovee