Added a / after the $F4 $00 to prevent the Yoshi drums from toggling between each loop. I also changed the submission type to a port since an unsampled port is a SMW arrangement. Other than that, this is a very nice port!
honestly this simply sounds like a typical unsampled port, doesn't particularly strike me as "smw arranged" especially considering you used custom adsr instead of the original. still, very good port in its own right!