[linux-audio-dev] XAP: Strings and Raw Data Controls

[Tim Hockin]

> So, the actual connections don't have much to do with snooping at 
> all, but rather look something like this:
 
 <snip nice ascii diagram>

> That is, the sequencer sends data to the synth *and* the synth's GUI. 
> This is what makes the GUI track the automation.
> 
> When automation is on "record", the sequencer takes input from the 
> GUI as well, and basically records it and forwards it to the Synth at 
> the same time.

I'd call that snooping.  And if a plugin controls another plugin, the host
has to snoop those events, too, or the UI is out of sync.