> ## Documentation Index
> Fetch the complete documentation index at: https://docs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Audio API reference

> Audio API reference for the Microsoft Game Development Kit (GDK), covering AcpHal, APU, AudioStateMonitor, XAudio2, XDSP, and related audio subsystems.

Audio API reference material for the Microsoft Game Development Kit (GDK).

## In this section

[AcpHal](https://docs.xbox.com/reference/audio/acphal/acphal_members.md)\
AcpHal APIs

[Audio Processing Unit](https://docs.xbox.com/reference/audio/apu/apu_members.md)\
APU (Audio Processing Unit)

[AudioStateMonitor](https://docs.xbox.com/reference/audio/audiostatemonitor/audiostatemonitor_members.md)\
Reference material for AudioStateMonitor APIs.

[ShapeContexts](https://docs.xbox.com/reference/audio/shapecontexts/shapecontexts_members.md)\
ShapeContexts APIs

[ShapeDmaContext](https://docs.xbox.com/reference/audio/shapedmacontext/shapedmacontext_members.md)\
ShapeDmaContext

[ShapeEqCompContext](https://docs.xbox.com/reference/audio/shapeeqcompcontext/shapeeqcompcontext_members.md)\
ShapeEqCompContext

[ShapeFiltVolContext](https://docs.xbox.com/reference/audio/shapefiltvolcontext/shapefiltvolcontext_members.md)\
ShapeFiltVolContext

[ShapeFlowGraph](https://docs.xbox.com/reference/audio/shapeflowgraph/shapeflowgraph_members.md)\
ShapeFlowGraph APIs

[ShapePcmContext](https://docs.xbox.com/reference/audio/shapepcmcontext/shapepcmcontext_members.md)\
ShapePcmContext APIs

[ShapeSrcContext](https://docs.xbox.com/reference/audio/shapesrccontext/shapesrccontext_members.md)\
ShapeSrcContext

[ShapeXmaContext](https://docs.xbox.com/reference/audio/shapexmacontext/shapexmacontext_members.md)\
ShapeXMAContext APIs

[XAPU](https://docs.xbox.com/reference/audio/xapu/xapu_members.md)\
XAPU APIs

[XDSP](https://docs.xbox.com/reference/audio/xdspaudio/xdspaudio_members.md)\
XDSP API

[XMA2Defs](https://docs.xbox.com/reference/audio/xma2defs/xma2defs_members.md)\
XMA2Defs APIs

[XAudio2 Helper APIs](https://docs.xbox.com/reference/audio/atoc-xaudio2helperapis-reference.md)\
Reference material for XAudio2 Helper APIs.

## See also

[Audio](https://docs.xbox.com/build/console-features/audio/gc-audio-toc.md)


## Related topics

- [Audio](https://docs.xbox.com/build/console-features/audio/gc-audio-toc.md)
- [XDSP audio](https://docs.xbox.com/reference/audio/xdspaudio/xdspaudio_members.md)
- [AudioStateMonitor](https://docs.xbox.com/reference/audio/audiostatemonitor/audiostatemonitor_members.md)
- [APU (Audio Processing Unit)](https://docs.xbox.com/reference/audio/apu/apu_members.md)
- [Overview of audio](https://docs.xbox.com/build/console-features/audio/overviews/audio.md)