Noise at Start Up Apple Logo

[iFission]

Hi,

Whenever my hackintosh starts up, there will be a hissing noise when the screen is showing the apple logo, before the password screen. The audio is from onboard audio connected to a pair of pc speakers via the back. Tested with headphones connected to the back and there is still the noise.

Weird thing is that when I plug the headphones into the front audio jack, the noise still comes out from the back of the motherboard and can be heard from speakers.

My build:
Clover v2.3k r3543
El Capitan 10.11.5
Gigabyte GA-H97-D3H LGA 1150
Intel Core i7-4790
Gigabyte GeForce GTX 760
Corsair Vengence 1600 4x4 GB

Kexts:
AppleIntelE1000e.kext
CodecCommander.kext // for audio for sleep
FakeSMC.kext
GenericUSBXHCI.kext // for USB3
USBInjectAll.kext // for USB3
realtekALC.kext // for audio

I used audio_cloverALC-110_v1.0r10.command from https://github.com/toleda/audio_CloverALC for audio, and http://www.tonymacx86.com/threads/f...p-on-1150-and-possibly-other-realteks.170063/ for sound after waking up from sleep.

Has anyone encountered similar problems?

Any help is greatly appreciated.

 

[iFission]

For those who are wondering, attached is a recording of the noise.

Thanks