The Siamesisk EP is a collaboration between art-rock indie band Under Byen and the renowned chamber orchestra Danish Radio Sinfonietta. The result is a 30 minute showcase of eight musicians working with a 42-piece classical orchestra to produce a collection that shivers and swells with an icy sensuality, evoking the majestic Nordic glacial terrain and the gothic tales of Hans Christian Andersen.

In April 2007, the band performed with the DR Sinfonietta in an old concert hall in Copenhagen. The audience of 1500 people enjoyed the exclusive concert consisting of five songs; four from Samme Stof Som Stof rearranged by former Under Byen pianist Thorbjørn Krogshede and composer Carsten Fundal into a carefully crafted audio expansion of Under Byen's distinctive theatricality. Pretty as a music box and grandiose as a full-scale symphony, Siamesisk successfully and intriguingly echoes the ancient ebb and flow of the sea against the Danish coast.