Echo Music Player- Offline Music is an open-source music player app for Android devices. It is designed to play your favorite songs offline without needing an Internet connection. It is also suitable for listening to the songs you want in the background.

The application can be customized to suit your preferences. You can choose the output audio format according to your requirements. For example, it can output a WAV file or an MP3 one.

You can also set the audio volume and the bass boost level.

The application also allows you to add favorite songs so that you can quickly find them later.