Bass Booster funktioniert nicht

Improve the audio quality to every song in your library and have a better experience every time you listen to music with the bunch of editing tools that will make your songs sound like edited by a professional DJ. • Add your favorite songs directly from your device, and boost your songs’ effects just by clicking right from your library. • Edit the songs you have saved in iCloud, Dropbox, and Google Drive in just a couple of taps. • Add stronger effects to your songs with an easy-to-use interface to boost the bass of each song in your device. • Rock, Pop, Classic, Latin, Hip-Hop, Dance, Acoustic, Electro, Jazz, and other different musical effects to give each song the style you prefer. • Edit any feature from your songs with our in-app equalizer feature. • Edit as many songs as you want, and create your own playlists to listen to your music any time of the day and share them in just a couple of steps.  Get the maximum of each song and enjoy your music as never before with the audio editing tools Bass Booster brings directly to your device.  Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. 10. 
11.  Listen to music as never before, and get the whole experience of professional edited music just in the palm of your hand. 2. 4. 5.  Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. 6. 7.  Bass Booster adds new features above and are available through an auto-renewing subscription.  Your subscription will automatically renew unless cancelled at least 24 hours before the end of your current subscription, and you can cancel a subscription during the active period.  Subscriptions will be charged to your credit card through your iTunes account.  You can manage your subscription at any time, either by viewing your account in iTunes from your Mac or PC, or Account Settings on your device after purchase.