Copenhagen post-rock trio Efterklang have announced details of their fourth studio album, Piramida.

The album – their second for 4AD after 2010‘s Magic Chairs – was recorded following the band’s visit to an abandoned mining settlement on Spitsbergen, 1,000km from the North Pole, last summer.

The album’s release will be followed by The Piramida Concerts, a tour in which the band will play with orchestras around the world including the Copenhagen Philharmonic and the Northern Sinfonia. Their 2007 album, Parades, was similarly given the orchestral treatment, with the results collected on 2009’s Efterklang & the Danish National Orchestra Perform Parades.

You can watch the video for ‘Hollow Mountain’, the album’s opener, below. It sees the band on typically symphonic form with tuned percussion, plangent brass and a choir all working to evoke the strangeness of the arctic tundra.

Piramida is due for release through 4AD on September 24. Full details of The Piramida Concerts can be found here.