FWIW - This is from WiiM Support (the wonder team
![Thumbs up :thumbsup: 👍](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png)
) while it's a bit off topic it is well interesting.
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Using MQA is very strict and the audio stream can't be changed. As we known, if you turn on EQ or adjust the volume less than 100, the audio stream will be changed and the MQA mark becomes broken, so your DAC can't detect the MQA stream.
Please go to Device tab -> Device setting gear icon -> Audio settings to turn on Fixed volume output and turn off the EQ setting on your device to maintain the MQA mark in the audio stream and your DAC will display the MQA badge.