There is more than one artist with this name:

1) Yolk is a UK Hardcore producer who was former member of EMF.
http://www.discogs.com/artist/Yolk

2) Yolk is a 4-piece indie band from Hamburg, Germany.
Founded in 1996.
With many "yolks" around, the band decided to change its name to "The Sea" in 2006.
The new website is www.theseamusic.com.

3) Yolk was ana ska/funk/rock band from Binghamton NY, active in the 1990s.

4) Yolk is a rock/psychedelic/experimental band from Dunkerque, France.
http://www.myspace.com/yolk2006

5) Yolk was a 4-piece spaced indie rock band from Caldas da Rainha, Portugal.
They were active between 1992 and 1995. Lena, Gonçalo, Charlie and Panqueca in the beggining were called Bloodofothers, but as Yolk they released 2 demo-tapes, "New Orange Juice" and "Happy-Go-Lucky", and some songs on compilation records, including the vinyl LP "Teenagers From Outer Space" and the cd "100%".
In 1996 Lena and Gonçalo started Mumo (www.myspace.com/mumospace), while Charlie and Panqueca went on playing with Orange.
Check out Lena's recent work on www.myspace.com/helenaveludo & www.myspace.com/stereoboymusic

6) http://www.myspace.com/yolkband

Genres:

Weirdo Rock, Rock

Band Members:

Brian Burrell, Jimmyjohn McCabe, Pete Carvelas, Jeffrey Pettit, Jim Loughlin, Jim Lomonaco, Adam Ash, Matt Murphy, Andrew Bellavia, Dave Fitzhugh