Windows Audio Processing Objects

Audio processing objects (APOs), provide customizable software based digital signal processing for Windows audio streams.

This section contains the following topics.

• Audio Processing Object Architecture
• Implementing Audio Processing Objects
• Implementing Hardware Offloaded APO Effects

APOs were first introduced in Windows Vista and you may see references to the earlier system APOs - sAPOs. For more information, see the Custom Audio Effects in Windows Vista white paper. This white paper may reference older COM and UI development topics.