For convenience, uos_LoadLib() without PCAudioFileName parameter is still there (and will set PCAudioFileName to nil).
Till now, only SimplePlayerMSE demo is implemented with the choice of the library to use.
Asap, it will be done for other examples.
PS: PCaudiolib can deal only with output-devices (not input like mic but it is on work) ...
Also PCaudiolib cannot give infos about the devices (at the moment).
If you need input and info device, you should use Portaudio.