"- New Mac Intel use 2 different CoreAudio device for input/output. Jackdmp cannot directly handle 2 devices to do duplex processing. An "aggregate" device has to be built in this case.
Use the "/Applications/Utilities/Audio MIDI Setup" tool to build and aggregate device that combine both input and output in a single duplex device, then select it when launching jackdmp, with something like :
….
….
jackdmp -R -d coreaudio -n "~:Aggregate:0"
or directly with the JackPilot tool.
So, it seems to me that Jack uses an aggregate device to carry out its task….and I’m not cool with that.
If there is not any other way, I’ll probably try (as already mentioned) to use the “classic” CAPlayThrough source code to forward the input to the output.
As I said, if anybody has any other idea is very very welcome.