The Mellotron Group

Max Werner - lead vocals, mellotron 
and of course Ton Scherpenzeel - keyboards (piano, moog, etc). 

http://www.youtube.com/watch?v=ypDKTb-IP18

I think this is the entire broadcast video. Total running time 
is just over 37 min. 

Many nice shots of the M400 not to mention the sound. 

-Allan 

P.S. Pardon me if this has been posted already.