Hy Raboof, from your git I built without problems
In my trials midi out seems to work fine (I used a midi out bus in Algoscore - connected to jack -, put some stuff on it and I can see midi events in output).
Concerning the broken audio interface of CSOUND6 I found the following in http://files.csound-tutorial.net/floss_manual/Release05/Cs_FM_05_ScrapBook/the-csound-api.html Each time a named channel with callback is used (opcodes invalue, outvalue, chnrecv, and chnsend), the corresponding callback registered by one of those functions will be called:
void csoundSetInputChannelCallback(CSOUND *csound,
void csoundSetOutputChannelCallback(CSOUND *csound,
These functions replace csoundSetInputValueCallback() and csoundSetOutputValueCallback(), which are still in the header file but are now deprecated.
So, in practise there should be a 1:1 replacement of that function, but I don't know if the structure channelCallback_t is ready or not in the code...