[rick6k0]

So what is the recommended audio setting for the Fire TV Cube? Set Fire TV audio to "Best Available" and change Kodi audio settings to 5.1. Would that work best if I want 5.1 LPCM? 

Edit: Since the question "what do you want to achieve" will probably come up: I just want 5.1 output if the source is 5.1 or higher. 
Or are the settings described by fritsch here the only way to achieve this currently?

HI, i m looking for the best build and better settings  to get a good multichannel  setup.


as fritsch said ,  lpcm passtrough is discontinued  on newer build , 

but you can get lpcm 7.1  with nightly build up to 20201222 " kodi-20201222-c43636da-master-armeabi-v7a.apk" 
set speaker mode with 7.1 (5.1)  and disable passtrough audio
Important, you must block the Amazon update   look at a while here "  https://www.aftvnews.com/how-to-block-so...-tv-stick/ "   ( i choose to use a pihole dns but cloudfare is nice),  Amazon will  transcode this format in a wong DD+ format  soon 

otherwise,  

use this  settings, is the actual only way  to get multichannel audio out.

enable passthrough mode 
enable  ac3 capability,  actice AC3 transcoding
uncheck all other format receiver capability   DTS,EAC3, DTS-HD.....

this is my firmware 's version Fire OS 7.2.2.9 (PS7229/1853)