What is the note at the 4th string 12th fret?

To determine the note at the 4th string (which is the D string) at the 12th fret, it's important to understand how the guitar fretboard is structured. Each fret on the guitar represents a half step (or semitone) in pitch.

The open 4th string is a D note. When you play the 12th fret of the D string, you are effectively moving up 12 half steps from the open string. A full octave is made up of 12 semitones, so when you reach the 12th fret, you arrive at the next D note an octave higher than the open string. Therefore, the note on the 12th fret of the 4th string is indeed D.

This understanding is essential for navigating the fretboard and helps you identify notes on any string at any fret. Recognizing the pattern of how notes ascend through the frets contributes to a deeper comprehension of music theory and guitar playing.