GABANG is an app that uses a Bluetooth microphone to record the voice of a singer. You can use this to record your own voice or that of a friend, and then play the recording back to them. It's also a great tool for people who want to learn to sing.

The app has a built-in database of thousands of songs, which you can search by singer, genre, or title. It also has a built-in karaoke function, which lets you sing your favorite songs with the built-in microphone. You can use the app to record your voice or that of a friend, and then play the recording back to them.