there was a similar discussion a while ago, see
http://genoqs.net/index.php?option=com_joomlaboard&Itemid=59&func=view&id=301&catid=6
I don’t have a Octopus, but I’m currently writing my own sequencer in Max/Msp that does use chordrecognition for manipulating sequences in realtime. It probably goes too far to descibe the whole process here, but Gabriel can contact me anytime for more info. [file name=testchordsmax2.mp3 size=2927340]http://genoqs.net/components/com_joomlaboard/uploaded/files/testchordsmax2.mp3[/file]