If you are experiencing audio problems when using LUMI Music, the best way of improving the audio performance of the app is by deactivating Speed Control and Enhanced Audio in App Settings.
How to deactivate audio features
From the Home screen, go to Your Profile by tapping your profile picture in the top-right corner.
In Your Profile, scroll down (iPhone/Android) or across (iPad) to Settings and tap App Settings
Disable ‘Speed Control’ and/or ‘Enhanced Audio’ to improve the audio performance of the app.