[LAD] RAUL or other libraries for real this time? ;-)

Still curious about RAUL. As i have no immediate plans beyond learning how to write proper audio app, even if license restrictions prevent from using RAUL in a hypothetical commercial product years down the road, it may well be worth me using for my own personal needs in the meantime. Would love to hear feedback on technical merits of RAUL, minus license conversations which now have my other thread. ;-) heck I'd like to hear about any other libraries worth looking into too. I'm trending at the moment to STK, embedded csound, Jack, and QT for gui. The part I need library help with is likely synchronization and interprocess/interthread communication. ( ie do I use the jack ringbuffer? Do I look at boost queue implementations? does RAUL have a higher level convenience ring buffer? thanks! iain