Is that true HD audio passthrough is purposefully disabled in libreelec (kodi) (DTS-HD, TURE-HD & DOLBY ATMOS)O?
If it is not true, why it is working in Android 7.x.x but not in other version
if yes, the when it will be enable (you mentioned it is under development it will be enable in Linux kernel 5.x)
@ Kwiboo : please can you give some updates, or have you stopped working on ROCK64 ?
Tested android-7.1.2-rock-64-rock64_atv, surprisingly what we are expecting in Libreelec (Dolby Atoms, DTS-HD MA, HDR & etc.) all are working
only one limitation is App's, you can not install all apps on this Android version (compatibility issue, any way other thing are working as expected)
Enjoy your ONKYO, Denon, Yamaha high end home theaters with HDR + Dolby Atoms
Tested LibreELEC-RK3328.arm-9.1.501-rock64.img.gz is very stable, study and perfect build compare previous builds.
HDR : prefect works
Videos : all formats are working
Resolution : very stable 4k 60fps
Audio : Except True-HD (Dolby Atmos) and DTS-HD MA all other audios are working
please fix : HBR (HD-audio) 
@ Kwiboo : we are waiting for your Replay. any update on the kernel 5.x Libreelec ?
Any Update Kwiboo new version of Libreelec with Linux kernel 5.x , much awaited & loved app. Kindly let us know availability for testing and enable our Rock64 as Home theater PC
Kindly let me know once kernel 5.x is launched, so that I can test and let you know
Display Moretoday I tested " LibreELEC-RK3328.arm-9.1-devel-20190512173254-bdfaff1-rock64.img.gz " build (rock 64 3328 4 GB)
My findings : Resolution limited to 1080p , 4K videos are not able to play (green Screen) , DTS-HD & Dolby ATMOS only noise. SMB service is not working with WiFi services
Android 9.x P version is perfectly working with all features, only missing Google Apps. It is media player and it plays every thing
based on your memory card select the link
rock64_dd_20190621_stock_rooted_android_9.0_sdboot-16gb.img.gz
rock64_dd_20190621_stock_rooted_android_9.0_sdboot-32gb.img.gz
Kwiboo: we appreciate your hard work, if you can give lill more information when kernel 5.x image will launch, libreelec has many features compare to android P
sure I will check and let you know the results.
today I tested one more package : Android TV 7.1 Community Build Image [microSD ]
Results: no HDR and 4k but Dolby Atoms & DTS-HD passthrough is working perfectly
rock64_20171204_stock_android_7.1.2_rooted_sd2emmc.img.xz
Onkyo , Yamaha, denon, Marantz & etc. use from HDMI …. CEC works perfectly. you can use T.V remote to control options
today I tested " LibreELEC-RK3328.arm-9.1-devel-20190512173254-bdfaff1-rock64.img.gz " build (rock 64 3328 4 GB)
My findings : Resolution limited to 1080p , 4K videos are not able to play (green Screen) , DTS-HD & Dolby ATMOS only noise. SMB service is not working with WiFi services
Android 9.x P version is perfectly working with all features, only missing Google Apps. It is media player and it plays every thing
based on your memory card select the link
rock64_dd_20190621_stock_rooted_android_9.0_sdboot-16gb.img.gz
rock64_dd_20190621_stock_rooted_android_9.0_sdboot-32gb.img.gz
Kwiboo: we appreciate your hard work, if you can give lill more information when kernel 5.x image will launch, libreelec has many features compare to android P
New preliminary mainline 5.x kernel images should be available next week or before the end of April for RK3328/RK3399 for testing.
You have to remember that HDR(awaiting Intel patches) and 10-bit support is now wip and won't work as on 4.4.x kernel images.
HD Audio is also wip but will be developed further for mainline kernel.
H264, H265, interlaced support is also being redesigned so there will be new issues and improvements.
So 4.4.x kernel images are the most stable until support for all the components get merged into mainline kernel.
from where I can download the 5.x kernel image (package) so that we also can test and give you the feedback. Thank you
NL-PCM (AC3/DTS) and HBR (HD-audio) support is next on my list after current 10-bit color and HDR work.
NL-PCM audio works unintentionally today and will most likely result in some pops or white noise in some cases.
I suggest you use regular L-PCM audio until NL-PCM/HBR audio is fully supported.
The plan is to create an alsa plugin that will modify the 16-bit sample bitstream into the 21-bit format the HDMI TX IP expects, if all goes well this plugin should also help enable NL-PCM/HBR audio on mainline Amlogic/Rockchip/Allwinner.
please can you let us know any timeline when the new version will getting release. (any tentative update)
Media file with TRUE-HD, Dolby Atmos & DTS:X doesn't work in Audio passthrough mode. "Rock64 4 GB" rest all works
But in Android 7.0 TV version all audio formats are working, but HDR will not switch automatically
