Hello, I as thinking that it would be great if after Hookpad analyzes a song via YouTube link, if Aria could be used to propose alternative melody improvisations.
I notice that also other tools like Orb Composer let you specify a music style/genre for the improvisation.
I think that should already be possible. If you have any song in Hookpad, including a YouTube song you have analyzed, you can always select one to four bars and let Aria create a new melody for that.
It usually tries to create something in the same style the song already has, but I understand that sometimes it would be nice to specify a music genre. I added that to our feature request list.