A free app for Android, by mystage.fm.

Music is one of the best ways to express your thoughts and feelings. It can bring happiness and joy to your life. But what if you are not good at playing it? What if you are a musician and you want to write down your music but you don’t know how to play it? This is the problem that this note recognition app solves. It detects your notes and converts them into alternative sheet music. This allows you to learn new songs and play along with your friends. It’s perfect for musicians who want to write down their songs or who want to learn new songs and don’t know how to play them.

The note recognition app works with pitch detection and frequency analysis (like FFT Fast Fourier Transformation for example).