"The Windows Audio Session API (WASAPI) enables client applications to manage the flow of audio data between the application and an audio endpoint device." Windows Developer. About WASAPI.
"To play an audio stream through a rendering endpoint device, an application periodically writes audio data to a rendering endpoint buffer. The audio engine mixes the streams from the various applications." Windows Developer. About WASAPI.
"Header files Audioclient.h and Audiopolicy.h define the WASAPI interfaces." About WASAPI. Windows App Development.
"the client can call the IAudioClient::GetCurrentPadding method to get the total amount of captured data that is available in the buffer." Capturing a Stream. Windows App Development.
"For a rendering buffer, the padding value that is reported by the IAudioClient::GetCurrentPadding method represents the amount of rendering data that is queued up to play in the buffer." Rendering a Stream. Windows App Development.
