KMixer is the Kernel Audio Mixer driver, a part of WDM Audio in Windows 98 to Windows XP which handles the mixing of multiple sound buffers into an output.
The tasks performed by KMixer.sys:
- Mixing multiple PCM audio streams
- Format, bit-depth (also known as word-length) and sample-rate conversion
- Speaker configuration and channel mapping
In Windows 98, Windows 2000 and Windows Me, the KMixer maximum sample rate is 100 kHz. In Windows XP SP1 and later, KMixer audio sampling rate supports a maximum of 200 kHz .
Read more about this topic: Windows Legacy Audio Components