[DirectX 8.1 C/C++ Programmer's Reference] Compression (100%)
DirectX 8.1 (C++) > DirectX Audio > Using DirectX Audio > Using Effects > Standard Effects
[DirectX October 2006 Documentation] Compression (78.9473684210526%)
DirectX Audio > DirectSound > Programming Guide > Using Effects > Standard Effects
[DirectX October 2006 Documentation] Compression Presets (34.0789473684211%)
DirectX Audio > XACT > XACT Audio Authoring