Please remind me how Isadora works with audio units/quartz composer timing wise?

[gavspav]

So if I have a quartz composer patch running in Isadora, how often can I expect data to flow either way?

Say my Isadora patch is running at 30fps and I have a QC actor which is running a stopwatch within it, will the stopwatch update 30 times a second or is the timing independent from Isadora?

And just to check, any data will be fed in/passed out of the quartz actor at 30fps (or whatever the frame rate is)? 

With audio units presumably data is passed out (sample rate/buffer size) times a second - all audio happens at this rate within Isadora? but control data is passed in at Isadora's frame rate?

Are any of these assumptions about right?