I found out how to approximate using the triplet glitch. You create a triplet and slowly get another note and move it into the triplet until it creates a really small note. do not release the note inside the triplet or hookpad will snap it back and break the entire project. Instead, while holding the note inside the triplet, press “S”, which saves the project with the 32nd or 64th triplet notes. I made projects using this glitch here: