No delay -Music string to Song Lutie (Clown)

Would anyone know how when using a clown, change from music string to song of lutie without any delay? i see alot of people doing it, because when i have tryed it, it takes me around 20sec before i can change, but it takes them 1 sec?

Is there any trick to this?

Help would be appreciated. Thanks.

well hotkey your lute and a dagger, then cast a song, then put on the knife -> the song cancel, then put on your lute/violin and you can a other song without any delay.

Get 2 of the same musical instrument (EX: 2 guitars) and put one to a F1-F12 hotkey.

When wearing the first guitar cast a song, press the guitar hotkey, cast another one, press the guitar hotkey, cast another one.

I think there are other skills you can spam this way.