Will the patches stream ok if they're outputting MIDI data or must it be audio? I could use a soundfont within the patch if necessary.

I often generate the material in other apps and trigger within Pd but if I'm generating material solely in Pd I tend to use a metro, counter, select combination to send out messages that alter the patches performance over time.

I've got a quick demo up here of a tone row patch being manipulated but will post some more when I get round to it!

http://www.algorithmiccomposer.com/2011/09/tone-rows-puredata-and-max.html