A free app for Android, by pittvandewitt.

The Wavelet app for Android is designed for your headphones or speakers, and it lets you customize the audio on your device.

In the app, you can add different EQs to the audio and then use the app to adjust the volume, boost or cut frequencies. You can choose to save your settings to the device or to the Google cloud.

You can choose from many presets or create your own. There are even settings for different types of music such as pop, rock, hip-hop, jazz, blues, jazz, country, classical, blues, jazz, rock, etc.

You can add a lot of effects, change the volume, cut frequencies, add equalizers and compression, and you can change the audio from the device or the Google cloud.