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How to enable audio codec power saving - ThinkWiki
https://www.thinkwiki.org/wiki/How_to_enable_audio_codec_power_saving
On-demand power control lets the kernel switch off parts of the audio codec and audio bus that are not in use at the moment. However, this can cause noticeable "click" sounds when enabling/disabling parts of the codec. AC97 audio subsystem. There's an experimental patch from 2.6.19-rc2, that was later corrected in 2.6.19-rc3, which enables the ...
How to enable audio codecs from the Fix it Program ...
https://answers.microsoft.com/en-us/windows/forum/all/how-to-enable-audio-codecs-from-the-fix-it-program/e6ee0e43-8c44-4e6a-b729-631d3f362e77
You may need to perform the following steps to re-enable the codecs. a. Click on Start, type regedit in the Search text box, and press Enter to start the Windows Registry Editor. b. Navigate to the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32.
Wake Enable - Windows drivers | Microsoft Docs
https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/wake-enable
To prepare for powering down, the function driver first configures the codec to signal the HD Audio bus controller when a status-change event occurs. Next, the function driver sends an IRP_MN_WAIT_WAKE power-management IRP to the HD Audio bus driver to tell it to enable the wake-up signal from the codec. Later, if the wake-up signal is enabled, and the …
Dynamic Audio Power Management for Portable Devices …
https://www.kernel.org/doc/html/latest/sound/soc/dapm.html
Dynamic Audio Power Management (DAPM) is designed to allow portable Linux devices to use the minimum amount of power within the audio subsystem at all times. It is independent of other kernel PM and as such, can easily co-exist with the other PM systems. DAPM is also completely transparent to all user space applications as all power switching is done within the ASoC core.
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