You know typing in a phrase to unlock something is called a "password", typing a string of numbers is called a "passcode"... well, this is the "passriff"! You play a little riff on the piano (if you've used Garage Band's keyboard on a mac, it's the same) and you just play the same riff to unlock it! If you want, you can see inside and change the range of acceptance. Otherwise, the concept is pretty straight forward :)
--credit to @griffpatch for making scratch able to detect more keys NOTE: there is still some difficulty with accepting the rhythm, so at the moment it will occasionally accept things that are nowhere close to the original. It's not too bad, but hopefully I will fix this soon :) ALSO: this can handle up to four notes at once, but it can be finicky sometimes. This mostly depends on the speed of your computer, but I have made some pretty good scripting that will try to guess at what you meant to play despite lag issues.
