I used to play Aion before XIV and one thing I loved from there (besides the swirly dancing penguin spell) were the violin, guitar and drums emotes, they'd play a pre-recorded song or 2 and lasted until you decided to cancel. It was pretty fun to go in the middle of the cities and start playing. So, in short, yes to musical instruments <3 especially if we can mesh them together with other players and make a more complex melody.