Musical Note Tuner will replace your old guitar tuner. Just play any note on your guitar, and Musical Note Tuner will use your computer's microphone to display what note you are playing, and how close you are to hitting that precise note. When you have hit your exact note, the needle glows and changes color. Musical Note Tuner is completely free and available for both download and use online, so you will never need to mess around with any costly guitar tuner again!