For a group founded on refusal, The New Blockaders have collaborated a great deal. It is less a contradiction than it looks. Where most collaborations in music amount to two recognisable personalities meeting and reinforcing each other, TNB's have always worked in the opposite direction: material is passed over, altered, buried, returned, and what emerges belongs to nobody in particular. Paul Hegarty has described the process as one in which individuality gets swamped, the sound cut loose from any controlling hand. Not a remix, not the jazz model of like minds finding each other in a room, but something closer to a culture left to grow in the dark.

Collaberrations gathers ten of these, across two discs of roughly seventy minutes each. Richard and Philip Rupenus working with Organum, with Coil and Vortex Campaign, with Ferial Confine, Nobu Yamada, The Haters and Vomir, Blue Sabbath Black Cheer and irr. app. (ext.), Raymond Dijkstra, Incapacitants, Das Synthetische Mischgewebe, and Anomali with Merzbow. Several run past a quarter of an hour. Mastered by Phil Julian.

The accompanying DVD is the more unexpected object. TNB have performed since the early 1980s behind masks, unannounced, frequently unrecorded, and this collects every performance for which film or video is known to survive. It opens with an anti-film from 1982 that has never been seen. Then Morden Tower in Newcastle in June 1983, audio only, the recording that first travelled to Japan and turned a handful of listeners there into lifelong advocates. Then Red Rose in London, NK in Berlin, the Arnolfini in Bristol, Tower Transmissions in Dresden, Cafe OTO, Sonic City in Kortrijk, the Auxiliary in Middlesbrough, and Summer Scum at TV Eye in New York in July 2024. Two sets by Nihilist Assault Group, the harsher alias, close it out. Forty years of a group that has never allowed a photograph of the brothers' faces into circulation, documented as fully as it is ever likely to be. Package design by Cormac Jordan.

Issued by PC-Press as the companion release to Nick Soulsby's book Viva Negativa! The New Blockaders: The Noise of Art and Nothing, and available separately.