Setting NooxZoide Pro to work with Spotify, or Viper4Android NON-ROOT alternative

Hi! I wanted to use Viper4Android but since I've just bought this new Moto G Plus, I didn't want to root it and mess with the guarantee. So, I'm trying to use NoozXoide, but it does not seems to work correctly with Spotify... It changes absolutely NOTHING on the sound. The odd part is that, sometimes, specially when I've just set NoozXoide and then I open Spotify, the musics start REALLY loud for like, 1 sec, and suddenly the volume drops... I'm not sure if I'm miss-setting something......

Setting NooxZoide Pro to work with Spotify, or Viper4Android NON-ROOT alternative

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