Here is a list of all related documentation pages:

PortAudio API Overview
PortAudio License
Blocking Read/Write Functions
PortAudio on Windows, OS X or Linux via. CMake
Building Portaudio for Linux
Building Portaudio for Mac OS X
Building PortAudio for Windows using Microsoft Visual Studio
Building Portaudio for Windows with ASIO support using MSVC
Building Portaudio for Windows with MinGW
Exploring PortAudio
Initializing PortAudio
Opening a Stream Using Defaults
Enumerating and Querying PortAudio Devices
Starting, Stopping and Aborting a Stream
Closing a Stream and Terminating PortAudio
PortAudio Tutorials
Utility Functions
Writing a Callback Function
Deprecated List