German string quartet Sonar meetrenowned soprano Juliet Fraser in a concert of ambiguous meaning and definitefeeling. Naomi Pinnock and Heinz Holliger are artists bonded by theiropen-ended style – both of them leave definitive impressions through sparsemusic, the kind that hovers over its listener indefinitely. Rather than fillthe space completely, they open it up, giving each listener the chance to placethemselves within the sounds. A founding member of the radical EXAUDI ensemble,Juliet Fraser lends the perfect voice to Pinnock and Holliger, colouring theirambiguous work with her own expressions. Along with Sonar, she becomes wrappedup in the pieces, experiencing them on the same immersive level as thelistener.