This app makes the volume buttons of the phone control the media sound only – without battery drain (like "Rocker Locker" does, for example).

Even if your device is not playing music or media files, the volume buttons will control the media volume instead of the ringer volume.

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Permission description:
Need permission to read phone status
When you are on a call, you may want to adjust the call volume - not the media volume in this case. That’s why this app needs permission to read the phone status to check that you are on a call.
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* This is an Open Source project. Please visit github.com/KrongKrongPadakPadak/mvo , if you are interested.
From version Media Volume only 1.0:
New release
All versions
May 24, 2017