Soundflower or Jack OSX ?

[Chris T]

I got Jack OSX to work with DP7.21 and Plogue Bidule. Routing is done and I think it's all working.

I'm triggering Bidule from DP via the default (IA) MIDI (in Bidule = Bidule 1,2,3 etc).

Problem is this: I have a brand new template, and load an NI Berlin Concert Grand piano in Kontakt 4 (latest update). When I play it, it immediately makes crackling sounds, (as if it's a processor issue?).

I tried playing an instance of Real Guitar (Music Lab) on another channel, and it played fine (no crackling).

I've doubled checked that my sample rate (48K), Bit Rate (24), and buffer size (512) is identical on all four apps (DP, Plogue, Jack and Kontakt 4 - updated). Is there anything I'm missing which could be the answer to why I'm getting this crackling?...

thanks