These are just a bunch of helpful sites I either use frequently or don’t want to forget. My bookmark bar was getting a little crowded.
Convert notes to hertz in a few different tunings
Does what it says on the tin, and vice versa
Library of hundreds of VGM sheet music and MIDI files.
Library of free sounds
Choose chord progressions and see popular songs that use those same chords
A collection of recordings, radio transmissions, etc. from various NASA expeditions
Convert any image format (including WEBP) into a png