Welcome to the "Jam Music" privacy policy.
Here we will describe the usage of permissions within our application and make things clear for you.

As it is stated in the description, application is advanced client for Jamendo music, with ability to preview and download. So, from the very application purpose we can derive few absolutely required permissions:

android.permission.INTERNET - It is impossible to provide you with access to remote content without internet connection.
android.permission.ACCESS_NETWORK_STATE & android.permission.ACCESS_WIFI_STATE - we need to monitor any connection events, such as disconnecting, or reconnecting, in order to handle all processes within the app correctly.
android.permission.WAKE_LOCK - utility, that helps all files to be downloaded completely, by preventing your phone from being asleep during download process.
android.permission.WRITE_EXTERNAL_STORAGE - this one is to write downloaded files to your sd card or phone memory.
android.permission.READ_PHONE_STATE - this permission allows us to interrupt music playback within the app when incoming call arise.

Application is free, and contains advertising:

android.permission.ACCESS_COARSE_LOCATION & android.permission.ACCESS_FINE_LOCATION - in order to provide you with the best user experience and to show you the most relevant advertising, we need to have your location data. Actually, application itself do not interested in your location and do not request it. It is only needed for advertisers, to make a decision about what banner to show you.

Two more permissions:
android.permission.RECORD_AUDIO - As any contemporary application, we have embedded voice search functionality, which involves your microphone.
android.permission.WRITE_SETTINGS - required for proper media player playback.