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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
Windows Vista also includes the ability to calibrate speakers to a given room's acoustics automatically using a software wizard. [7] Windows Vista also includes the ability for audio drivers to include custom DSP effects, which are presented to the user through user-mode System Effect Audio Processing Objects (sAPOs). [8]
Windows XP Service Pack 3 also includes the updated driver, as well as Windows XP Professional x64 Edition with Service Pack 1 and 2. In Windows Vista, the Windows Logo program requirements state that any machine shipped with Vista must include a UAA-compliant audio device that works without additional drivers.
Sound Recorder in Windows Vista can no longer open audio files. Moreover, it cannot save in lossless (uncompressed) WAV format when run without using any switches; instead, it saves in lossy 96 kbit/s WMA format. Only the version of Sound Recorder from the N editions of Windows Vista saves audio in WAV format by default. [133]
WSS 1.0a drivers were released in February 1993. They introduced single-mode DMA, supported games in MS-DOS, Ad Lib and Sound Blaster emulation. [4]WSS 2.0 drivers, released in October 1993, added support for OEM sound cards (Media Vision, Creative Labs, ESS Technology) and included an improved DOS driver (WSSXLAT.EXE) that provided Sound Blaster 16 compatibility for digital sampling. [4]
DirectSound is a deprecated software component of the Microsoft DirectX library for the Windows operating system, superseded by XAudio2.It provides a low-latency interface to sound card drivers written for Windows 95 through Windows XP and can handle the mixing and recording of multiple audio streams.
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As of Windows Vista Beta 2, the NVIDIA GeForce 6 series and later, the ATI Radeon 9500 and later, Intel's GMA 950 and later integrated graphics, and a handful of VIA chipsets and S3 Graphics discrete chips are supported. Although originally supported, the GeForce FX 5 series has been dropped from newer drivers from NVIDIA.