You can't control the volume by app, but you can control it based on a channel (like stereo or 5.1), and you can control it based on an output device. If you don't want your external speakers ...

no matter how low you fixed the volume. This possibly occurs due to some sound card drivers which install their own proprietary audio controls that may also affect volume. So, unless you have the ...

Apps can add a lot of functionality. Some can add more steps for more granular audio control. Others can put volume controls in the notification panel or the quick settings. There are many ways to ...