múm Wikipedia

múm (pronounced "moom"; in IPA, [muːm]) is an experimental Icelandic musical group whose music is characterized by soft vocals, electronic glitch beats and effects, and a variety of traditional instruments.
The band was formed in 1997. Its original members were Gunnar Örn Tynes, Örvar Þóreyjarson Smárason, and twin sisters Gyða and Kristín Anna Valtýsdóttir. In 2002, Gyða left the band to return to her studies in Reykjavík. In early 2006, her sister Kristín also left the band, although it was not officially announced until November 23.
According to founding member Kristín Valtýsdóttir, the band's name was not intended to mean anything. In an early interview, with the now defunct Icelandic paper Fókus, the name was explained as a picture. That is, the written letters "múm" are like two elephants, nodding their trunks.

Members
Current
Gunnar Örn Tynes
Örvar Þóreyjarson Smárason

Former members
Gyða Valtýsdóttir
Kristín Anna Valtýsdóttir

Discography
Albums
Yesterday Was Dramatic – Today Is OK (TMT, 2000)
Finally We Are No One (Fat Cat Records, 2002)
Summer Make Good (Fat Cat Records, 2004)
Compilations
Blái Hnötturinn (Not On Label, 2001) (Soundtrack)
Please Smile My Noise Bleed (Morr Music, 2001) (3 New Tracks + Remixes)
Remixed (TMT, 2002) (Versions of Yesterday Was Dramatic -Today Is Ok)
Loksins Erum Við Engin (Smekkleysa Records, 2002) — the Icelandic version of Finally We Are No One
Singles and EPs
"The Ballad of the Broken Birdie Records" (TMT, 2000)
"Green Grass of Tunnel" (Fat Cat Records, 2002)
"Nightly Cares" (Fat Cat Records, 2004)
Dusk Log (Fat Cat Records, 2004)
The Peel Session (Fat Cat Records, 2006)(Maida Vale 4 Studio 2002)

Trivia
A photograph of Gyða and Kristín Valtýsdóttir was used for the front cover of Belle and Sebastian's 2000 album "Fold Your Hands Child, You Walk Like a Peasant".
Gyða and Kristín have an older third sister, Ásthildur, who sang with the group on one tour in November 2002.