Tom Service [The Guardian, 20 January 2006]

Theatre of Voices's performance of Stockhausen's meditative masterpiece Stimmung began as a ritualised processional: the six singers, resplendent in suits of white and beige walked onto stage to sit round a table in whose centre shone a glowing orb. The atmosphere was that of a weird musical seance as they bowed to each other and intoned the single, hypnotic chord that would underpin the 90-minute performance.