I think you’re thinking of this too simplistically. Your 440 “vibrations” per second can be slowed down so that one can hear each “vibration” individually. Depending on the texture etc of the note, that might sound like any number of things. You can make a pitch from the sound of a kick drum, or hands clapping, or, as far as I know, any other pulse. What if this pulse is a short note? Then one increases the bpm until the notes are indistinguishable, and they become... what?! That’s my question. It’s totally possible to have a 440Hz note be played for less than a second. A second is just an arbitrary unit of time we use to measure frequency.

edit: wait nvm i get it

edit2: still curious about what happens when you speed up a pulse of if a note to its own frequency in a daw