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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
AC'97 is supported by most operating systems, such as Windows (starting with Windows 95) and Linux. Under DOS, applications access the sound hardware directly instead of through the operating system, and most DOS applications do not support AC'97. 64-bit versions of Windows 7 and later require a third-party driver for AC'97 support. [9]
Three classes of audio devices are supported by default: USB, IEEE 1394 , and Intel High Definition Audio, which supports PCI and PCI Express. Starting with Windows Vista, Microsoft requires all computer and audio device manufacturers to support Universal Audio Architecture in order to pass Windows Logo certification.
Windows Vista Enterprise supports up to two physical CPUs, [18] and the 64-bit version supports up to 128 GB of RAM. [19] Windows Vista Ultimate "Windows Vista Product Red" gadgets Windows Vista Ultimate includes all features of the Home Premium and Business editions, as well as BitLocker and MUI; it also provides access to optional "Ultimate ...
Windows Vista builds on the Universal Audio Architecture, a new class driver definition that aims to reduce the need for third-party drivers, and to increase the overall stability and reliability of audio in Windows. Support for Intel High Definition Audio devices (which replaces Intel's previous AC'97 audio hardware standard)
Common device driver compatibility issues include: a 32-bit device driver is required for a 32-bit Windows operating system, and a 64-bit device driver is required for a 64-bit Windows operating system. 64-bit device drivers must be signed by Microsoft, because they run in kernel mode and have unrestricted access to the computer hardware. For ...
Previously, the WDK was known as the Driver Development Kit (DDK) [4] and supported Windows Driver Model (WDM) development. It got its current name when Microsoft released Windows Vista and added the following previously separated tools to the kit: Installable File System Kit (IFS Kit), Driver Test Manager (DTM), though DTM was later renamed and removed from WDK again.
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]