The violin carried the melody. It was like the modern guitar in a rock band.

Symphonie is a German band.

Symphony is a long and complex sonata for symphony orchestra

Yes, it is. Lots of classical music is played by a symphony orchestra. There are thousands upon thousands of classical orchestral works - too many to list here.

Symphonie is a German band.

Symphony is a long and complex sonata for symphony orchestra

It was one of the first jazz compositions to be performed as an orchestral classical work. The original scoring was for dance band; it was performed by Paul Whiteman's orchestra. The piece was later rescored for symphony orchestra.