2025-07-27 00:00:00 Decibelion is an instrument tuner but with the unique feature of displaying the note on a music staff. This is particularly helpful if learning a musical instrument as you can *see* what notes you're playing and how in-tune you are. The app uses the device's microphone to detect a music note, and it shows the detected note on a music staff. With the note, it provides some visual cues about whether the note is being played in tune or out of tune so that the app's user can more effectively learn to distinguish an in-tune sound and ultimately play their instrument better. I hope the app helps someone learn the violin or guitar or something. For me, I'm learning the violin, and the app has been helping me a lot. I use the app myself. Say good-bye to guess-work at what note you're playing on your instrument and whether or not that fingering is in-tune or not. The "music mic" page of the app shows you all the information you need. On the music staff on that page, a green fully-filled-in note means you're in-tune. A red note with only its bottom-half filled in means you're out-of-tune flat. A blue note with only its top-half filled in means you're out-of-tune sharp.