unconcerted

adjective

1. contrived or arranged by agreement; planned or devised together: a concerted effort.
2. done or performed together or in cooperation: a concerted attack.
3. Music. arranged in parts for several voices or instruments.

adjective

1. mutually contrived, planned, or arranged; combined (esp in the phrases concerted action, concerted effort)
2. music arranged in parts for a group of singers or players