Musician (From Wikipedia)

A musician usually plays a musical instrument, especially (although not necessarily) as a profession. Musicians can be classified by their roles in performing music and writing music. A person who makes music a profession, anyone (professional or not) who's skilled in making music or performing music creatively, or one who composes, conducts, or performs music (especially instrumental music) is a musician.

Musicians can be of any music style not limited to classical, orchestral or choral, and musicians can have skills in many different styles outside of their professional experience. Examples of musicians' skills are the orchestration of music, improvisation, conducting, singing, composing, arranging, and/or being an instrumentalist.

Nice little article on electroacoustic music:

http://en.wikipedia.org/wiki/Electroacoustic_music

Also, a more in depth article on Electronic Music and musicians/composers/performers:

http://en.wikipedia.org/wiki/Electronic_music

Or...Musique concrète

http://en.wikipedia.org/wiki/Musique_concrete

The term "musician" obviously has a very broad meaning...much like defining "music".

Ian