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Algorithms for Buffers

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[The feature associated with this page, DirectSound, is a legacy feature. It has been superseded by WASAPI and Audio Graphs. Media Casting have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Media Casting instead of DirectSound, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

When you create a secondary buffer with the DSBCAPS_CTRL3D control flag, you can also specify an algorithm to be used in spatializing the sound if the buffer is in software. By default, no head-related transfer function (HRTF) processing is performed, and the location of the sound relative to the listener is indicated by panning and volume only. You can request two levels of HRTF for the buffer.

For more information, see DSBUFFERDESC.