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MSDN Library Visual Studio 6.0 > Platform SDK > Graphics and Multimedia Services > DirectX 5 > DirectX Foundation > DirectSound > DirectSound Architecture
[MSDN Library June 1998] Hardware Abstraction Layer (HAL) (58.5914289958408%)
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[MSDN Library June 1998] Hardware Abstraction Layer (37.0842086834734%)
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[MSDN Library June 1998] Hardware Compatibility Information (27.3977743271222%)
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[MSDN Library September 1992] Hardware (13.5586349924585%)
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