Human: What are the main differences between a symphony and an opera? Assistant: 
The main difference between a symphony and an opera is that a symphony typically has three or four movements, while an opera usually has five to eight. A symphony generally has more instrumental solos than an opera, with the exception of some operas such as Mozart’s Don Giovanni, which have no solo parts at all. Additionally, a symphony often contains more complex rhythms and harmonies than an opera. Finally, a symphony tends to be played by a larger orchestra than an opera.