Amazon Music HD With iOS, macOS, Windows 10

October 23, 2019 § Leave a comment

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“I tested iOS with my iPhone 11 Pro running version 13.1.3. I connected my phone to the same Alpha USB and Alpha DAC RS3 for testing. Setting a baseline, I played all sample rates via Qobuz bit perfectly through my iPhone 11 Pro. Just browse, click, and play. Switching to Amazon Music HD for iOS showed a major design flaw in this app. The Amazon app queries one’s audio device, in my case the Alpha USB, EMM Labs DV 2, and dCS Rossini, for its highest sample rate and sets the audio output to 192 kHz if the highest rate is at or above 192 kHz. Thus, whatever music was played via the Amazon app, it was sampled at 24/192 because that’s the max of the Alpha USB, and the other two DACs support higher rates. This same behavior can be witnessed using an AudioQuest DragonFly as well. The Amazon Music HD iOS app will set the DragonFly to 96 kHz no matter what’s playing.

In this configuration, playing Neil Young’s Greatest Hits worked perfectly. The album streamed bit perfect through my iPhone. Switching to any other album that wasn’t available at 24/192 meant that the audio was altered / resampled before getting to my audio system. There’s no way to manually set this sample rate int he app, like there is in macOS. I suppose one could get a D to D converter that supports a max rate of each sample rate and connect it to an iOS device based on the music selected. Oh wait, audiophiles are a strange bunch, but that is a bridge too far”

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