Plelleian is a gender where all the music is playing at once, it may even be muffled. This is a metaphor for experiencing many genders all at once, as in multigender.
A more specific label would be melleian.
Etymology
Plelleian is a word mixture of melody, playlist, and listening.
History
This gender was coined due to wanting a static version of genderplaylist. It was coined by Reddit user u/hiitsyaz on the 7th of August, 2021.