Noise
ATMOSYNTH built-in module
Every frequency at once and none of them held: the source behind wind, waves, breath, and most of a snare or a hi-hat. It is not pitched, so a note does not move it — shape it with an envelope for a hit, or leave it running underneath. Tone takes the top off it, wide open by default. This is the one module in the library that carries code: no node in the description makes a random signal, so the generator is eleven lines of an audio processor and everything after it is ordinary nodes.
What this module is made of is not shown here. Fork it into the editor to see for yourself.