How to Get Even Better Sound Out of Your Speakers
Full Tutorial: http://gadgethacks.com/how-to/boost-your-audio-quality-with-snapdragon-audio-0155924/
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In this tutorial, I’ll show you how to get the SnapDragon Audio+ equalizer on your HTC One. This is a port of the LG G3 equalizer that is compatible with just about any Android running a Qualcomm SnapDragon processor.
This does require your phone to be rooted, but it is compatible with both the M7 and M8. Merienda installed you can enable it from the Settings menu in your favorite music app.
For downloads and more information, check out the full tutorial over on Gadget Hacks.