Now WiiM device supports Amazon Music HD/UHD on WiiM Home app or from native Amazon Music via Alexa casting. Please ensure your device's firmware version is higher than (4.6.420352) and update your apps to the latest version.

WiiM device supports the bit-perfect output such that your audio output resolution will be the same as the one of your input source. Even though the SPDIF/COAX output resolution is set to 24 bit/192 kHz, it won't up-sample the audio to the fixed resolution of 24 bit/192k Hz. Please check the sample rate and bit depth of the played music on your native Amazon Music App or WiiM Home app and see if it matches the output from WiiM device.

Moreover, there are different quality tags on the WiiM App. The HD tag means the original content is in 16 bit/44.1k while the Ultra HD tag indicates the content is in the resolution 24 bit/44.1k or beyond. Please select the music with 24-bit, 96kHz, or 192kHz to try.

1. Enable Amazon Music HD/UHD with the WiiM Home app

Please follow the steps below:

1. Open WiiM Home app

2. Select Browse tab > Amazon Music to sign in to your account on the WiiM Mini device

3. Go to Settings in the Amazon Music screen to turn on Amazon Music HD/UHD. (It's turned on by default). 

2. Enable Amazon Music HD/UHD with Alexa Casting

Please ensure your WiiM device is signed into Amazon, you can cast up to 192 kHz/24-bit Hi-Res music gaplessly from the Amazon Music App to the WiiM Mini with Amazon Music Casting.

Please follow these steps to enable Amazon Music Casting:

  1. Go to WiiM Home app > Browse > Amazon Alexa to sign in to your Amazon account. Please make sure the account of your Amazon Alexa is the same as the one used in the Amazon Music.
  2. Go to Amazon Music App > Playing UI > Tap Alexa Casting icon to check if the WiiM Mini is under 'Select a Device to Play Music'.

     3. If you can't see the WiiM device, please wait for some minutes. Amazon Music needs some time to fetch a new device.

     4. If you don't get Amazon Music HD/Unlimited, please go to Browse tab -> Amazon Music -> Tap the top right settings icon to turn on Amazon Music HD/Unlimited HD.

Here's a link to a video for your reference.