what guitar tuners do?

There are many types of guitar tuners with different features and uses.There are  analog or digital tuners. Some of them play specific notes and some more advanced ones play different notes in different pitches. The feature rich ones can play every possible note. Some guitar tuners have audio input while many others analyze the sound coming from microphone. Basic tuners are only able to produce the tones.

Simplest guitar tuners can detect and give you just 6 simple notes in just one pitch (usually "A" or "E"), or at least they give you a few pitches for tuning your guitar (like 6 simple pitches used in the standard classical guitar tuning , E,A,D,G,B and E), and yes we some advanced tuners which they can offer you various chromatic tunings that you can use to tuning your guitar and play it in different styles, this way will allows all 12 notes of the scales to be tuned with you guitar tuner on your guitar.

Some new electronic digital guitar tuners offer you other advanced features too, some features like adjust pitch calibration, play some sounds in desired pitch, with you ampli and speakers with high volumes (lol) and some other settings that you can set them to your guitar tuner to have everything you need with your guitar and pitches and notes.

So for now you can select which guitar tuner is perfect for you to playing guitar in your best way, so pick one of them to start guitar tuning now.