Poweramp

Usefulness.
Of course, you can do a standard audio player, but it has quite a few drawbacks. This player compensates them with interest, from the use of the interface, and the last range of playable formats.
Opportunities.
In this player, there are a number of excellent qualities, considering that you hardly want then to use the standard pleeroom. You can start with the format already, in addition to the standard, such as MP3, WMA, OGG and WAV. This player plays the same losseles-formats such as. FLAC, so you can enjoy high quality music without any noise and loss of compression. Then equalizer here is not just a set of sliders with presets, there is also the possibility of fine-tuning and create your own presets. You can assign specific presets for specific music. There's also a bass boost and stereo expansion to increase volume and the volume.
Interface.
Can enumerate possible without end, in this player simply much. But none of the music player will not be used no matter how he was not featured, if it is crude and awkward interface. And poweramp interface just everything is in order, from the thoughtful design, ending the possibility of changing the covers and just resuming them from Market. The app also has its own lock screen, it means that if your phone is locked you will still have access to its functions directly from the lock screen.
Summary.
Great app for any music lover. There is not only the opportunities for sound reproduction but also thoughtful interface with customization for themselves. There is one caveat though, it is not free, and when will the trial period it will either need to remove or buy, but the amount of positive feedback suggests that those who paid for it, do not regret a penny.