choir or orchestra is another word for music group
another word for large group is clan.
Another word for gather or collect is... handle or group together.
assai - very, in music
yes
Perhaps you are looking for the Sound of Music.
Composing is another word for writing music.
group
A group of witches is a coven.
authorized
Melodrama .
Adagio.
well another word could be a party or a group