Classical music performances are held at the Royal Opera House, with the seasons changing every six months or so. Check the schedule at their website (rohmuscat.org.om) but be warned that the tickets are often sold out weeks in advance. Some of the hotels, particularly the Grand Hyatt Muscat and the Al Bustan Palace also arrange events where, for example, the Royal Oman Symphony Orchestra might perform. There is a fairly regular pop and rock concert scene, and you might be able to catch a few performances from big name stars: keep an eye (or ear) out for announcements in newspapers, email newsletters and on the radio.