A concert for just two or even more main instruments, with orchestral accompaniment.
A concert for just two or even more major tools, with orchestral accompaniment. Additionally adjectively.
In songs: A composition appropriate a concert.
A composition for 2 or maybe more solo sounds or devices, with accompaniment for organ or orchestra, therefore built that each associated with the solo sounds or instruments comes into importance in turn.
A composition for 2 or more solamente devices without orchestra.