 Important: |
|---|
| This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist. |
Most sound cards support some level of hardware mixing if there is a DirectSound driver for the card. The following tips will allow you to make the most of hardware mixing:
- Use static buffers for sounds that you want to be mixed in hardware. DirectSound will attempt to use hardware mixing on static buffers.
- Create sound buffers first for the sounds you use the most. There is a limit to the number of buffers that can be mixed by hardware.
- At run time, use the IDirectSound::GetCapsmethod to determine what formats are supported by the sound-accelerator hardware and use only those formats if possible.
- To create a static buffer, specify the DSBCAPS_STATIC flag in
the
dwFlagsmember of the
DSBUFFERDESCstructure
when you create a secondary buffer. You can also specify the
DSBCAPS_LOCHARDWARE flag to force hardware mixing for a buffer,
however, if you do this and resources for hardware mixing are not
available, the
IDirectSound::CreateSoundBuffermethod will fail.
Last updated on Tuesday, May 18, 2004