It is seemingly unaware a Dac is connected to the iPad whereas the other apps are not.
So it seems when using an iPad, the Amazon music app is pretty dumb compared to other apps that can send what Amazon terms ultra HD out full fat when the Amazon app can’t. I have a quobuz subscription and their iPad app will also send 96khz music files to the Dac 96kz (and also downsamples 192khz to 96khz automatically). Play the same album on Amazon music and the best it will do is 24/48 despite the album being “ultra hd”. I have the Onkyo app configured to downsample anything greater than 96khz to that and that is what the Dac reports as what it is receiving. So for example I have a copy of David Bowie’s Hunky Dory album which is 192khz 24 bit. If I use the Onkyo music player app with the audioquest and play some high res tracks downloaded onto the iPad I get the full 96khz.
So Amazon is reporting the capability of the iPad, not the Dac. Plug it into the iPad and amazon music reports the device capability as 24 bit 48khz which it (the Dac) isn’t, it will do 24 bit 96khz. But HD might actually mean SD if you read here. Try that and the yellow Ultra HD symbol in Amazon's own app gives you a little wink and drops down to 'HD' instead. Yes, I can cast to the CCA at 44.1kHz (as reported by the DAC). My work gives me some Android phone thing, so in complete desperation I installed the Amazon Music app on it. But there's glitching every few seconds and the DAC reports all tracks at 48kHz (not 44.1kHz) Used in Chrome browser, this allows me to cast to the Chromecast Audio. When using the Amazon web player all mention of HD or Ultra HD disappears from the interface. Suppose I could use a digital cable to my DAC but my laptop doesn't have a digital output - nor do I want to use a cable Zero AirPlay or Casting options as far as I can see Amazon Music HD desktop player (for Windows computers) You can also forget about 44.1kHz because all Apple TVs (for example) output everything at 48kHzĢ. AirPlay on Apple TV: Amazon states AirPlay is constrained to a 16-bit signal max, so you can forget about Ultra HD.
Chromecast Audio: The CCA refuses to appear in the devices list hence casting from the Amazon app is not an option. All in the context of transferring a digital signal to a DAC. My quest has been mostly fruitless so far, even though my DAC accepts digital signals up to 24 bit and 96kHz (and will report the incoming sampling rate) preserving the original Amazon streamed bit depth and sampling rate. Listen to Amazon Music HD and Ultra HD via a digital input (e.g.
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