Tenor Simon O'Neill, soprano Janice Watson and bass Daniel Sumegi join the HK Philharmonic Orchestra (left) in performing Wagner's The Valkyrie: Act 1. The Orchestra, with Edo de Waart conducting, also plays Beethoven's Symphony No 1. Fri-Sat, 8pm, HK Cultural Centre, 10 Salisbury Rd, TST, HK$180-HK$680 Urbtix. Inquiries: 2721 2030