Windows 7 wave out driver

Privacy policy. In Windows Vista and later operating systems, support is provided for a wave real-time WaveRT port driver that achieves improved performance but uses a simple cyclic buffer for rendering and capturing audio streams. The WaveRT port driver provides support for audio devices that can do the following:. They can use the improved scheduling support that is available in Windows Vista, to reduce the latency of an audio stream. If you want your audio device to take advantage of the improvements in audio offered in Windows, your audio device must be able to play or capture audio data with little or no intervention by the driver software during streaming.

A properly designed audio device that uses the WaveRT port driver requires little or no help from the driver software from the time the audio stream enters the run state until it exits from that state.

The behavior of the waveOut Xxx and waveIn Xxx functions is based on the capabilities of legacy wave drivers and devices. However, by emulating the behavior of older software and hardware, the waveOut Xxx functions sacrifice the 3-D sound effects and hardware acceleration that are now available through the DirectSound API. DirectSound and the Windows Multimedia wave functions are clients of the SysAudio system driver , which builds the audio filter graphs that process the wave and DirectSound streams.

Graph building is transparent to the applications that use these software interfaces. The following figure shows the user-mode and kernel-mode components that a wave application uses to render or capture a digital audio stream consisting of wave PCM data. The rendering components appear on the left side of the preceding figure, and the capture components appear on the right.

The boxes representing the wave miniport driver are darkened to indicate that these are vendor-supplied components. The other components in the figure are system-supplied. At the top left of the figure, the wave-rendering or "wave-out" application interfaces to the WDM audio drivers through the waveOut Xxx functions, which are implemented in the user-mode WinMM system component , Winmm.

The application reads blocks of wave audio samples from a file and calls the waveOutWrite function to render them. WDMAud, which consists of both user-mode and kernel-mode components Wdmaud. KMixer is a system component that receives wave PCM streams from one or more sources and mixes them together to form a single output stream, which is also in wave PCM format.

KMixer outputs a wave stream to a WaveCyclic or WavePci device, whose port and miniport drivers appear below KMixer on the left side of the preceding figure. The miniport driver binds itself to the port driver to form the wave filter that represents the underlying audio rendering device. A typical rendering device outputs an analog signal that drives a set of speakers or an external audio unit.

The right side of the preceding figure shows the components that are needed to support an application that captures wave data to a file.

The wave-capture or "wave-in" application communicates with the WDM audio drivers through the waveIn Xxx functions, which are implemented in the WinMM system component. At the lower right corner of the figure, the wave-capture device is controlled by wave miniport and port drivers.

The port and miniport drivers, which can be of type WaveCyclic or WavePci, bind together to form a wave filter that represents the capture device. This device typically captures an analog signal from a microphone or other audio source and converts it to a wave PCM stream. You can follow the question or vote as helpful, but you cannot reply to this thread. I have the same question Report abuse. Details required :. Cancel Submit. In reply to wsdp's post on March 31, Sorry, busy Easter weekend.

Just tested this. The process I would recommend is to install all available updates. If the update then breaks or removes Realtek, re-install Realtek and do not reboot after the install. Close the install without rebooting and then use the classic Control Panel to check for updates.