@FinalGirl we went to a sing-in recently and i had to invest some serious effort into not dropping into masc voice (which i never ever use and cant even find when i try). there was also a lot of flailing around, trying to figure out how to sing in femme voice, especially in a group.
i think singing, whether its performing or communal, requires a sort of persona, and i need to build a new one—and until i do, my body tries to fall back on earlier defaults.