[himey]

Whatever you get out of kodi after that is NOT the unalterend CD, as this would be just Stereo. Kodi will use FL and FR to create SL and SR as well as FC.

Not on my firestick 4k with the settings I mentioned. I have mentioned this before the new update. All the other settings mess with the output. Upmix turned on and speakers set to 5.0 gets unaltered CD @ 16/44. Any other settings screws up bit perfect. Yes I realize the settings are quirky but whatever works.

Post your debug log. You will clearly see that kodi is generating 5 channels. That your firmware down mixes it again still does not make it bit perfect. Though: as said before: if you are happy, stay happy.

Before the new firestick update, I could bitstream a DTS CD rip to my processor using the settings, upmix ON and speakers set to 5.0. It was the only combination of settings that would send bit perfect audio to my processor untouched. There is NO upmixing going on even with the new firmware although passthrough is broken and I can no longer send DTS to my processor with DTS CD rips which are held within a standard 16/44.1 PCM container.

This may be too confusing to you. Most people don't even know what a DTS CD is and don't care about multichannel audio other than for movies/tv.

The new firmware will still send CD rips bit perfect to my processor at 16/44.1 PCM if you turn on upmix and set speakers to 5.0. My processor shows 2.0 and 16 bit, 44.1 khz. The other speakers are silent and not getting upmixed audio whether you believe it or not!

If there was upmixing and downmixing involved like you believe, the channels on DTS CDs would sound screwed up which they didn't.