Happy New Year to all!

I'm using the latest JACK version1.9.12. I compiled on Linux Ubuntu PC and used to capture audio and analyze.

When I started with simple_client.c application, what I notices is the first buffer from Jack call back function is 

all zeros. Why is the first buffer not having valid audio samples ? Is this the expected behavior. 

I also like to know any features being planned for 2018 release of Jack ? 

-ben