Hi there caden136,
We understand that the audio quality on your HomePod mini is not as clear when using Spotify over AirPlay as it is when using Apple Music. We’d like to help however we can.
Which device are you using with AirPlay and the HomePod mini? Does this happen with other apps that play audio content as well? Is this happening with music you have downloaded onto your device or are you streaming the music?
Let’s also follow the steps in this article to see if they help:
If AirPlay or screen mirroring isn’t working on your device
Let us know if you have any other questions.
Best regards.