DJFon is a great tool to create music on an Android device. You can modify audio settings, volume, songs duration and equalization. The way the audio files are mixed can be manipulated using adjustments to produce amazing results. It is the perfect tool for music engineers, producers, or even artists.
This app is available in the Google Play Store: https://play.google.com/store/apps/details?id=com.danmobx.djfon