Question: What are the names of tracks that are Rock or MPEG media type?
SQL: SELECT T2.name FROM genres AS T1 JOIN tracks AS T2 ON T1.id  =  T2.genre_id JOIN media_types AS T3 ON T3.id  =  T2.media_type_id WHERE T1.name  =  "Rock" OR T3.name  =  "MPEG audio file"