(Android) $0 FREE Note Recognition (Was $3.09) @ Google Play

Rated 4.2 with over 50k installs and no IAP.

"Note Recognition & Audio Speed Changer - Convert Music into Sheet Music" is a note detection & audio speed changer app that converts music into an alternative sheet music. It helps you learning new songs by displaying sheet music suggestions for the recorded audio and provides you the functionality to change the audio speed and slow down your recorded music ("audio slow motion").

The note analyzer works with pitch detection and frequency analysis (like FFT Fast Fourier Transformation for example) and is perfect for musicians (especially vocal and guitar or piano players). The note analyzer listens to your music, analyzes it's pitch and converts your music back into an alternative sheet music. You can use it to detect the notes of your songs (note identification, the app helps you creating a transcription), validate the pitch of your voice, sing into the microphone and use it as a vocal trainer or to transcribe your songs while playing along with your guitar (or whichever instrument you are playing). And of course, you can also use the note recognition app as a simple audio / voice recorder.