A free program for Android, by AbyKaby.

AbyKaby is a free music editing app. You can add bass, boost, and equalizer to your music tracks. 

How to use the music editor for Android?

AbyKaby can be used on your phone and tablet. It works on Android 4.4 and above.

Open the app and tap on the button to open music tracks. Then, choose the song you wish to edit.

You can also search for a track by name, album, or author.

You can move the slider to choose the musical fragment you want to edit. You can also change the intensity of low frequencies, mid frequencies, and high frequencies.