MSI Cubi 2: HDMI audio not working (though headphones audio work)

Hi /r/Hackintosh,

I'm seeking help while I'm trying to turn an MSI Cubi 2(-012BEU) into a High Sierra computer.

I'm all new to hackintosh, I followed this guide and went without major issues to a nicely working OS.

I have one minor issue with audio support though. The Cubi has front headphones/mic connectors and HDMI audio. I can hear sound with headphones plugged in when I test but I can't get the HDMI audio to go through my monitor/TV.

I did my little research, tried all the possible layout IDs for the codec the Cubi has (ALC887 from what I found for Cubi's hardware). Also tried "audio_cloverHDMI-130_v0.6.command" but it fails with "0x16590000 not supported", or inject hda-gfx by enabling "UseIntelHDMI" in the properties of the config.plist.

I may be missing something, has anyone encountered a similar problem on this type of hardware?

Below you can find an extract from HWInfo of the specifications:

Computer Brand Name: MSI MS-B142 Processor Name: Intel Core i5-7200U Motherboard Model: MSI MS-B1421 BIOS Vendor: American Megatrends Inc. BIOS Version: 8.10 Module Size: 8 GBytes (note: 16GB total) Memory Type: DDR4 SDRAM Memory Speed: 1066.1 MHz (DDR4-2132 / PC4-17000) Module Manufacturer: Corsair Module Part Number: CMSO16GX4M2A2133C1 Intel Kaby Lake-U/Y PCH - High Definition Audio Controller Audio Adapter: Intel Kaby Lake-U/Y PCH - High Definition Audio Controller Audio Controller Hardware ID: PCI\VEN_8086&DEV_9D71&SUBSYS_B1421462&REV_21 High Definition Audio Codec: RealTek ALC887 Audio Codec Hardware ID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0887&SUBSYS_00000000 Video Card: Intel HD Graphics 620 (Kaby Lake-U GT2) - Integrated Graphics Controller [H0] [Micro-Star International] Video Bus: Integrated Video BIOS Version: 1046 PC 14.34 07/21/2016 23:19:17 Video Unit Clock: 400.0 MHz Memory Clock: 1064.0 MHz Hardware ID: PCI\VEN_8086&DEV_5916&SUBSYS_B1421462&REV_02 PCI Location (Bus:Dev:Fnc): 0:02:0 

And for reference, a paste of the config.plist I'm using.

I thank you a lot in advance for your help! Have a nice day!