Rolf Johannes Ellmer (born 3 December 1960) is a classically trained musician and composer (concert-guitarist) and has become one of Germany's most well known producers in the techno and trance scene.

Together with Markus Löffel (alias Mark Spoon), also from the German music scene,[1] he has recorded under several monikers such as Jam & Spoon,[2] Tokyo Ghetto Pussy and Storm.

He was a member of the group Dance 2 Trance, along with Dag Lerner (alias DJ Dag), which had success all over the world and he is considered to be one of the pioneers of trance music.

[citation needed] A string of hits under Jam & Spoon include "Right in The Night", "Stella", "Kaleidoscope Skies", "How Stella Got Her Groove Back", and "Set Me Free (Empty Rooms)".

Ellmer has also worked as a producer and remixer for other artists such as Deep Forest, Enigma, Moby, and Frankie Goes to Hollywood.