ALC898 Pops and weird noises in audio under Yosemite

[Supacon]

...I am using the same motherboard and Clover and am curious how you got sound to work at all?

Hi cardo:
This is a long story. Initially, I had originally installed using Unibeast and Multibeast but then installed Clover due to iMessage not working. Maybe I just got lucky, but it basically all 'just worked'. Sort of.
I ended up having issues where clover would boot to a black screen or maybe to a (\) forbidden symbol. To make a long story short, I ended up reinstalling Yosemite with a Unibeast USB drive, then made a Clover installation roughly following the instructions here: http://www.tonymacx86.com/mavericks...-how-install-os-x-mavericks-using-clover.html

I struggled with audio for a bit, but once I had a clean installation of Yosemite, I was able to use this guide to install the audio kext to Clover:
http://www.tonymacx86.com/audio/112458-mavericks-audio-realtek-alc-applehda-guide.html
and
https://github.com/toleda/audio_ALCInjection/blob/master/[Guide]-Add_HDEF-Clover.pdf

[REDACTED DUE TO INACCURATE INFORMATION]

 

[Supacon]

Well, I managed to completely bork my whole bootloader setup and had to do the whole thing over again, so this time I took notes of the process. I'll describe the audio part here in detail since last time I was working from a fairly inaccurate memory.

Once your system is booting okay with Clover, to get Realtek 898 audio to work, follow these steps:

Go here and download audio_cloverALC-100.command:
https://github.com/toleda/audio_RealtekALC

Go into the terminal and mount your EFI partition:
If you don't know how, first run

diskutil list

Then look for the EFI partition on your boot drive. In my case it's partition 1 on disk0 (disk0s1)
Run:

mkdir /Volumes/EFI
sudo newfs_msdos -v EFI -F 32 /dev/disk0s1 [b]<- Put your own EFI partition here[/b]

Once you have that done, run audio_cloverALC-100.command

Several questions will come up. This is how I answered them.

Confirm Realtek ALC898 (y/n): [b]y[/b]
Clover Audio ID injection (y/n): [b]y[/b]
Use Audio ID: 1 (y/n): [b]y[/b]
Working dsdt/ssdt HDMI audio? (y/n): [b]n[/b]
Use Audio ID: 1? (y/n): [b]y[/b]

Note: in my case I made a few edits to the .command file to change Mavericks to Yosemite and 10.9 to 10.10.

If you try this, let me know how it works for you and if I missed anything. It would be good to have this procedure properly documented.

 

[Stingray88]

I too am having the same problem. GA- Z77X-UD5H with ALC898. I have a pop sound every time sound starts.

I'm having this same problem. I was previously using the MacPro3,1 smbios and everything worked just fine. Then today I switched over to iMac13,2 to get something working speedstep... and now this audio issues arrises!

It sounds like when my Mac Pro at work is first turned on, a loud pop happens as if the audio hardware has gone to sleep. Quite annoying...