The sound is really bad. It makes my ears hurt.
The sound is unbearable. Some real improvement is needed here.
The sound falls flat. There has been a lot better.
The sound is not very good. A lot more effort should have been put into it.
The sound is below average. Hopefully, they will do better next time.
The sound is OK. There is not much to complain about.
The sound is really good. Only a few oddities now and then.
The sound is well done. It's all-around solid with not much to complain about.
The sound is the best I've ever heard. This is the new standard in sound!