Here is an example I developed to test recording audio from a microphone using the same code for both Windows and Linux. It uses the excellent open-source PortAudio library with the C++ wrapper. A makefile is provided for Linux and a Visual Studio 2005 solution for Windows.

The example is a simple command line program that:

• Lists the details of all the audio devices found.
• Plays a sine wave beep.
• Records 16-bit 16kHz audio.
• Saves the audio to a file (raw format).
• Plays back the recording.
• Allows input/output devices to be specified via command line arguments.