Crackling sound in VM (via HDMI)

[Alphahelix]

Hi all,

 

First I like to point out I am totally new to Unraid but have played with ubuntu before, yet I am no expert.

 

I have an Unraid box (tyan s7012 with 2x X5660 and 144GB RAM) where I would like to create some VM's among them a Windows 10 for games.

I succeeded in creating a VM where I got quite good performance on the graphics part, the sound part - not so much.

 

After trawling the internet (thanks to all who have posted solutions in this forum, and Spaceinvader 1 on youtube, all have helped alot)

 

I spend a few weeks to get my old GTX 560 TI to work but I could not even install windows, until I read somewhere that it is only from the 600 series and up. Ok that made sense, I then plugged in my GTX 1060 and what do you know, it worked the first time.

 

But then I got to the sound problem.

 

Tried solutions:

BIOS "seaBIOS" vs OVMF - OVMF only gices a black screen, so SeaBIOS it is!

Hyper-V on/off - no difference

fix sound quality to CD-sound - no difference

change settings in regedit to MSI (Message Signaling Interupt) - no difference

change settings in regedit to MSI for both entries of the graphics card - one difference, windows never got picture back and had to delete the VM and start over.

 

I also noticed a strange behavior where I ain't sure if it is an Unraid issue or a local issue (read my motherboard/CPU). But if I choose to use cores 8-11 AND 20-23 it takes more than 15 minutes to post in the VM. But if I choose 8-11 OR 20-23 it post right away. But it is a thread in another category.

 

If anyone out there has an idea where I miss a piece of the puzzle, or where I forgot a setting please tell me, as I am growing more and more desperate.

 

Kind regards

Alphahelix

[Adam64]

Same problem here -- crackling sound.  It doesn't always crackle, just when it starts playing a sound.  I've tried passing through a couple of different sound cards too, but no difference.  Windows 10 VM btw.

[Alphahelix]

I gave up on HDMI sound and bought a cheap USB sound card and passed some USB ports through to solve this. and it works... sort of. it sometimes drops, but I do think it is due to my 15-20m long usb cables.