Hallo,
lanas hat gesagt: // lanas wrote:
  That's not it I think.  Using a sequencer for that
is like painting the
 Mona Lisa by number.  Tangerine Dream surely have used some sequencers
 but a large part of their work resided in the capability to modify in
 real time what sound like 'sequences' by turning knobs and plugging
 wires as sounds were made.  As such, it was really a performance, more
 than we could think in general.  So I think rather they were using
 complex arpeggiators.  Today we can listen to that and write it down in
 a MIDI file, but that's not what I'm looking for. 
The modern equivalent to what you describe could be live coding in Pd,
SuperCollider etc., e.g. 
http://www.youtube.com/watch?v=9zKzxqN5mUI or
http://vimeo.com/5272693
Ciao
--
Frank