Two solitary instruments – viola and cello – are heard on separate soundtracks by separate video screens showing footage from the former concentration camp Theresienstadt: peeling walls, cobwebs, a lifeless gym hall. The composition they play was created here; the Czech-Jewish composer Pavel Haas (1899-1944) wrote an orchestral piece that the Nazis used as the soundtrack to a propaganda film about Theresienstadt. We don't hear any orchestra. This is why the two instruments sound so abandoned. Although they also talk together; tones are repeated many times, as if they are trying to breathe life into the empty spaces. The melodic lines are detached from the context they should be in, but cannot be in, because the composer was taken to Auschwitz and murdered shortly after he performed the piece.

Like other Holocaust representations, Turner Prize-winning Scottish artist Susan Philipsz lets us see that the visible traces of the atrocities have disappeared. The camera makes an effort. In that resounding emptiness, ghostly garlands of mismatched tones resound. They are full of holes – there should have been more musicians to make this piece of music sound right. In the speakers, the cello and viola sound almost electric, eerie, it's all so slow, the tones are stretched until they can't do it anymore. In his book Images in Spite of All the art theorist Georges Didi-Huberman defended using all images that exist from the atrocities. The same here: Haas' music calls to be heard, not forgotten. They are sounds, after all. Amputated, seeking for beauty, or remnants of something seeking for beauty. For no composer – even under the worst conceivable conditions – makes music that is deliberately evil.

To ensomme instrumenter – bratsch og cello – høres på hvert sit lydspor ved hver sin videoskærm, som viser optagelser fra den tidligere kz-lejr Theresienstadt: afskallede mure, spindelvæv, en gymnastiksal uden liv. Kompositionen, de spiller, er skabt hér; den tjekkisk-jødiske komponist Pavel Haas (1899-1944) skrev et orkesterværk, som nazisterne brugte som lydspor til en propagandafilm om Theresienstadt. Vi hører ikke noget orkester. Det er derfor, de to instrumenter lyder så forladte. Selv om de også taler sammen; toner gentages mange gange, som prøver de at puste liv i de tomme rum. Melodilinjerne er løsrevet ud af den sammenhæng, de burde være i, men ikke kan være i, fordi komponisten blev myrdet kort efter, han opførte værket.

Som andre Holocaust-repræsentationer lader den Turner Prize-vindende skotske kunstner Susan Philipsz os se, at de synlige spor af uhyrlighederne er forsvundet. Kameraet gør sig umage. I dén rungende tomhed runger de spøgelsesagtige guirlander af toner, som ikke passer sammen. De er fyldt med huller – der burde have været flere musikere til at få dette musikstykke til at lyde rigtigt. I højttalerne lyder celloen og bratschen næsten elektriske, uhyggelige, det er så langsomt det hele, tonerne strækkes, til de ikke kan mere. I sin bog Images malgré tout (Billeder trods alt) forsvarede kunstteoretikeren Georges Didi-Huberman brugen af alle billeder, som eksisterer fra grusomhederne. Det samme her: Haas’ musik påkalder sig at blive hørt, ikke glemt. De er lyde, trods alt. Amputerede, skønhedssøgende, eller rester af noget skønhedssøgende. For ingen komponist – selv under de værst tænkelige forhold – laver musik, som er bevidst ond.