Which note corresponds to the open 4th (D) string?

The open 4th string of a standard-tuned guitar is tuned to the note D. This string is positioned in such a way that when played without pressing down on any frets, it produces the pitch of D. Understanding the standard tuning of the guitar is fundamental, as each string is assigned a specific note.

In standard tuning, the 6th string (the thickest) is E, the 5th string is A, the 4th string is D, the 3rd string is G, the 2nd string is B, and the 1st string (the thinnest) is E again. This layout establishes a reference point for identifying notes on the fretboard. Therefore, recognizing that the open 4th string corresponds to D helps in navigating the entire fretboard effectively.

While C, E, and F are valid musical notes, they do not correspond to the open 4th string in standard tuning, which is specifically tuned to D. Understanding this relationship between string numbers and their corresponding notes is essential for any guitarist mastering the fretboard.