Jazz-electronica quartet Supersilent distinguish themselves from other groups in the Norwegian scene by not using sequenced set-ups as the basis for their music. Nor do they rehearse or discuss their music in advance, instead collectively improvising it in the moment. The general approach on this, their sixth album, is darkly moody, slow and hypnotic. It’s difficult to measure the success of such music, which depends on the listener’s receptivity. Those of avant-garde taste may be persuaded.