Running from August to October each year, the Ruhrtriennale international festival brings music, dance, theatre, performance and other arts together in the former industrial buildings of Germany’s Ruhr region. The festival’s focal point is the Jahrhunderthalle, a former boiler house for the vast Krupp steelworks in Bochum. Its acoustics provide many challenges for audio engineers, but this year a Yamaha RIVAGE PM10 console helped to tame the sound for the opera Alceste.