Static .a libraries of Portaudio.
Demo fpc for linux-windows.
The libportaudo.a in the demo is for Windows 64.
If you want to compile for a other OS, use the libs in portaudio-static-xxx.zip and copy it in the root folder of the demo and rename it as libportaudio.a.
Compile with fpc -FUunits -Fl. -B portaudio_demo.pas