Hi, glad you like them! The amount of time it takes depends on the song and whether or not I have to pick it out by ear. The Zelda dungeons were pretty easy because there was a MIDI file available and the themes themselves were short - usually less than an hour per dungeon. However, the Diamond and Pearl pieces were long and complex, and there was no MIDI available. Dialga took me over 6 hours; Cyrus was even longer than that!