changing the speed of a graph actually pauses it, changes speed and restarts. therefore i see no way to do this without clicks in vvvv.
but. we’ve been talking a lot recently about linking vvvvs clock and directshows clock…somehow. or even being able to generate directshows clock manually in vvvv via an lfo…or such stupid things. this could then maybe allow you to change the rate of the clock (instead of the speed parameter) and consequently the playbackspeed of an audio/video file.
hower those fiction thoughts may not help you for now. what about pd? should be easy there.
just downloaded the chronotron but didn’t find its directshowfilter (if there is any). if there was one i could probably include it into vvvv if they publish the parameters properly!
i’d also say. use pd only for the audio-processing part. and communicate with vvvv for the visual stuff. i’ll be back in office around 14th. maybe i could give you a hint on the pd-part (you have to pick up your mirror anyway).
hmm…its a directshow-thing. setting the rate of the graph actually stops and restarts it. therefore changing the rate will not do without hickups.
concerning different behaviour changing rate at source or sink: directshow-manual says you should not change the rate of individual filters but rather of the graph (who will then change rate on all its filters in the correct order) only. so i guess what you encountered was random.