A free program for Android, by Kushiheim.
The Equalizer is an audio equalization application for Android devices. It can enhance the sound quality of your device and make it more comfortable to listen to music. It can help you adjust the sound so that it is suitable for your ears.
It can be set to either of the following eight frequencies: 32, 64, 96, 128, 160, 192, 256, and 320. The level of each band can be adjusted from 0 to 100 percent. The application can be used with either music players or audio devices.
It is divided into three bands: low, mid, and high. The application allows you to choose the sound quality and also the volume of each band.