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How to enable Dolby on Sierra (IDT92HD87B2/4)

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Dec 11, 2017
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Pavilion G7 2254sr
Intel Core i5 3xxx
Intel HD 4000 /AMD RADEON 7670M(disabled)
6GB RAM
Sound chip: IDT92HD87B2/4 started

Hello. I need to enable Dolby sound on Sierra. I enabled sound with AppleAlc method, but the sound is very quiet compared to Windows.
On Windows the same quiet sound without drivers. On Windows when you install the IDT driver, it immediately sounds louder.
How to enable Dolby Sound ?
 
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Yes.
Assuming IDT/AppleHDA is working, your choice: IDT/analog speakers or IDT/optical
If IDT/AppleHDA is not working: USB/analog speakers or optical
Post to the linked thread
I did not understand what installation to install me? can you help? I do not understand English well.
 
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