In #SYTER computer, there were algorithms for pitch, reverb, timestrech and a synthesizer. It wasn't in real time, you had to write the task you wanted the computer to do, then wait (sometimes for 6 hours). Only 9 task could be made at the same time and it was for only a few seconds of sounds. Just imagine those composers during that time, cooking their prompts to the computer then wait for the next day to hear the results ! Sort of like doing ceramics.