Did You Know?
Did you know that the guitar is a transposing instrument? It is. What’s a transposing instrument? A transposing instrument is an instrument whose written notes are read at a pitch different than concert pitch. What is concert pitch? Concert pitch is a standard set for use in orchestras. In concert pitch the A note above middle C on the piano is 440 Hz.
Guitar is written one octave (the equivalent of 12 frets on the guitar) higher than it sounds in concert pitch. Why? Because the guitar is a midrange instrument. If written in concert pitch (like a piano) guitar notation would fall across both the treble and bass clefs, making it harder to notate and read.
Now you know.