In the area of instrumental music, more specifically, of wind instruments, a fingering is indeed a thing. It refers to the combination of keys or valves that brings the effective length of an instrument to the correct size to resonate at a particular frequency.
For modern brass instruments, this is accomplished with valves, either rotary or piston. When a valve is pushed, it allows the air to flow through additional tubing, changing the different possible resonant frequencies.
Of course, it isn't that easy, you can't just push the correct buttons and the correct sound comes out, but the rest of it? It's a long story, and it does not belong on this node!