I keep the wikipedia page bookmarked: https://en.wikipedia.org/wiki/List_of_musical_symbols It may not be compact enough to make a poster but this is extensive: https://www.dolmetsch.com/musicalsymbols.pdf There are so many symbols. It's going to be hard to put all of them on one sheet. More on reddit.com

Bend the note a quarter tone up (half a semitone) Hammer On - go from the first to the second note by only using your fingering hand, don’t pluck it. Watch a video that explains hammer ons and pull offs ;-) P is Pull Off, the reverse of a hammer on Slide your finger from one note to the next More on reddit.com

I’m a little confused at what you need exactly. Like, just 128x128 pngs of musical notes? You could just mock that up in paint.net in like ten minutes (or be clever and use Inkscape to make proper vector graphics instead!) Or do you intend to generate sheet music from this? If so, you’d probably want to abandon the idea of individual note images in general, and instead have component parts (heads, stems, flags, etc) and build a system to assemble these into actual notation More on reddit.com

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