Default [Q] How do I increase Bluetooth volume?

The overall volume on the Nexus 5 (and every Android phone I have had) is very low. I even just rooted my phone to adjust the volumes in "mixer_paths.xml" only to realize that I can only adjust headphone and speaker volumes there.

Is there a way to increase all media volume, or at least Bluetooth volume?

With almost everything I play on my Nexus 5, I have to set the volume at about 90% to get the volume right. That leaves no range if I need to increase it when something was recorded at a low volume. I would like to make it so that a normal volume setting is more in the 50% range.