This ports all properties of the MidiSynth to C++ (except for object properties
SNet/PNet).
I had to fix a bug in BsePcmOutput (first commit), because setting the volume
on the output object had no effect, but I wanted to test my code.
To have 1:1 the same ranges, I introduced constants for
As discussed previously, I created one example what happens if I try to port a
property that contains an Object to C++. I choose Song postprocessing network
as example.
```
stefan@quadcorn:~/src/ghbeast (object-pport-error % u=)$ make -j1
MODE debug
CHECKConfiguration
