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Intel High Definition Audio - OSDev Wiki
https://wiki.osdev.org/Intel_High_Definition_Audio
The following steps must be performed to play audio on an HD Audio device: (1) Create a buffer list structure, and add at least two buffer entries to the list. (2) Setup an output stream descriptor, normally located at memory offset 0x100 in the register table above.
HD Audio - 维基百科，自由的百科全书
https://zh.wikipedia.org/wiki/HD_Audio
HD-Audio還有AC97所沒有的多音效系統Multi-Streaming功能。 就硬體規格上的功效表現來說，Intel HD Audio具有192kHz 取樣率 、32-bit 解析度 、2（雙）聲道的音質，或者也可以將聲道數增加，但取樣率部分必須妥協折衷，成為96kHz取樣率、32-bit解析度、8聲道的音效組態。
HdaIntelSoundHowto - Community Help Wiki
https://help.ubuntu.com/community/HdaIntelSoundHowto
More Notes on HD-Audio Driver by Takashi Iwai - excellent document that explains many issues with the snd-hda-intel driver written by one of the module's authors. Another solution. Check if your device card model is a Realtek and download alsa from Realtek site:
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