What are the requirements for any music player app?

Following are the minimum requirements:

1. File and folder manager for the browsing of the music library
2. 'Now playing' music console(pause, play, next etc.)
3. Basic audio files codec support.
4. Volume adjuster (equalizer optional)
5. Song duration with song completion status bar.
6. Album art display compatibility (highly recommended)
7. Playlist support and Playlist creation.
8. Artist, all songs, album etc. Organization
9. Status bar support

Other recommend features :

1. Headset buttons compatibility
2. Multi band Equalizer with genre presets and bass, treble, surround sound adjusters.
3. Homescreen widgets.
4. Preamplifier.
5. Stereo volume distribution adjuster.
6. Replay gain, gapless playback.
7. Multi language support
8. Audio file tag info and edit.
9. Album art auto gainer from Web.
10. Themes or skins
11. User customizable UI
12. Lock screen support
13. Scrobbling (sync with sites like last.fm)
14. Songs by Eminem.

- Samarth.

Happy learning