That is a document listing the supported incoming media. Not what it outputs. You can send 24/96 to a Chromecast Ultra, but you will get 24/48 out of it via HDMI.
Firestick only does 48/24. Also if your amp has Bluesound module that supports Amazon HD natively.
You cant get Amazon HD on a ChromeCast you can only currently cast lossy files it wonât be streaming the hd or ultra HD stream. There are only two effective ways to getit properly use an Amazon link or Bluesound device as they will switch rates accordingly and wonât resample. Any other device cannot currently output bit perfect unless the output rate matches exactly the sample rate of the file, if it doesnât it will resample to match the output rate of the device, no Amazon apps autoswitch sample rate based on the media, this includes pc, Mac, Android, iOS and any fire devices. Itâs a pile of streaming crap, if you donât care about your audio being messed with then play along with it otherwise I would advice leave it alone like the plague.
Well, it seems Amazon donât want you to do that.
But - I found a work around which seems to work.
I use my Galaxy s8, and share the screen (using Samsungâs âsmart viewâ to my Google Chromecast TV) with its hdmi into my (old) Panasonic TV. The spdif from the TV goes into my Arcam DAC to my hi-fi, and the Amazon music HD app confirmed it was 24bit (unlike the vague denial when using the Chromecast audio). My DAC does not display bitrate, so canât say for certain BUT it did sound fantastic!
(the âshare screenâ from a Moto6 phone did not appear to share the audio in the way the Galaxy S8 did, so may not work on different phones.)
Kinda gave me a buzz to get round Amazonâs pathetic blocking of use on the Chromecast audio device)