Music & Lights is a free Android app developed by 9Spikes.com, perfect for music enthusiasts who like to play, listen, and sing. The app displays dancing colored shapes on the screen that reflect the sounds around you. It also features a piano-like keyboard with high-quality synthesized sounds, such as electric piano, organ, harpsichord, and more.

You can configure the sound pad for two performers, and the app supports polyphony up to 7 notes. Additionally, you can customize the tone of the first key and the number of white keys in a row. As for the lights, the app has 7 color shapes and a random shape mixture, with auto-adapting sensitivity of the microphone.

It is important to note that the banner will be removed for the current session when viewing ads, and you can make a purchase within the app to remove the ads permanently. Also, the sounds are synthesized "on the fly" with the CPU, so you may experience sound distortions on a slow device.

The app requires permission to record audio for listening to sounds with a microphone and full internet access to provide the ads. If you're looking for a fun and entertaining app to enjoy music, Music & Lights is definitely worth a try.