Resident HDMI Audio expert toleda has released a new script which automatically configures HDMI audio for most desktop systems with Intel, AMD, and NVIDIA graphics using Clover bootloader.
The new method, called CloverHDMI requires no DSDT edits. The script detects and installs correct ssdt(s) and Intel framebuffer patches for the connected HDMI display enabling OS X HDMI audio.
How to use:
1. Download the script: audio_cloverHDMI-110.command.zip (El Capitan) or audio_cloverHDMI-120.command.zip (Sierra)
2. Mount EFI partition
3. Double-click the script, which will open in terminal
4. Answer y/n at the prompts
5. When script is done, reboot system