A free app for Android, by mxsnvsp.

Music Player – MP4 MP3 Player is a free and simple to use music player for Android. It supports MP3, OGG, FLAC, WAV, AIFF, WMA, APE, MOD, XM, S3M, and other audio formats. It also supports playlists, albums, artists, genres, tracks, playlists, and songs. It also supports the music library, audio tag editor, and music tag visualization. It supports playback control and the playback queue.

The MP3 Player includes a built-in equalizer with 10 presets, 5 bands, bass booster, music virtualizer, and 3D reverb effects.

You can set your own background image. It also allows you to choose your own picture from the gallery. It allows you to set different pictures for the background and the lock screen.