[PD] New user - technical questions

[Xavier Miller]

Hello, greetings from Belgium,

I am starting with Pd and have some questions:
- does Pd support multi-threading? If not, is it possible to launch many 
Pd instances and sync them?
- can Pd dynamically change its patches without stopping the engine? Can 
Pd unload some objects, open other patches, connect them?
- can Pd run without GUI, even without X support?
- can Pd be embedded in an application, and controlled programmatically? 
(if not, I can use OSC)

Kind regards,
Xavier Miller.