MIDI devices mostly refer to musical controllers. With it, you can plug a controller and play piano on https://pianu.com, for example. I use it sometimes. - Source: Hacker News / almost 3 years ago

I asked it to write sheet music. Don't know why since I don't play an instrument... It didn't draw any trebles or anything but it did give me letters to go with the lyrics I asked it to create earlier. So then I thought: maybe there's an app for that and found a few websites like https://typatone.com. I put the letters in and presto! Music! Source: over 1 year ago

I had no idea there was a potential "real person" there any more than I thought Mario/Luigi were real. Maybe I'd never even seen an image or box to make that connection? I remember that the software was really useful early on -- and game modes even made it a bit competitive. For a left-field alternative for super young kids (3? 4?) just being introduced to letters/keyboard try out Typatone (https://typatone.com/).... - Source: Hacker News / about 2 years ago

Typatone https://typatone.com/ is website where you can write something and every key you press plays a note while you're typing, however it only works on the website itself. Source: almost 3 years ago