fair warning. When you try to upload your song and it says The file you attempt to upload is invalid: (type of file), do the following steps.
1: first log in of course.
2: Go to where you saved your song.
3: Right click the file and re-name it.
4: out down this - (song name).note - Since the computer is very smart, it can also read any type of file. So putting down (.note) in the end of your music file, your computer will be able to change the file type to .note AKA notessimo’s file type.
5: After re-naming, try to re-upload again and there you go!
P.S: Do not do this to any other file but your music file you are trying to upload. If you do this to any other file, you will mess up that file and that file will never be able to run again.
Well, if you change the extension back to the original one then the file will be playable again, the extension doesn’t change any of the actual file other than the name.
But, yes, changing the extension to .note will not automatically make notessimo able to read the file