The 4-String Bass: A Beginner's Guide to Strings, Tunings and the Fretboard
The 4-string bass is the instrument you feel as much as you hear. It sits underneath the band, holding the rhythm and the harmony together, and it is one of the most rewarding instruments to learn because a few well-placed notes can make a whole song come alive. This guide covers the basics: how the strings are tuned, how to remember that tuning, how notes are laid out on the fretboard, what the bass actually does in a band, and how the alternate tunings on this site change the picture.
Four Strings and the Standard Tuning
A standard bass guitar has four strings. In standard tuning, from the top string to the bottom, they are E, A, D, G.
A quick word on "top" and "bottom", because it confuses everyone at first. When you hold the bass in playing position, the thickest string is physically on top, nearest your chin. That is the E string, and it gives you the lowest, deepest note. As you move down toward the floor, the strings get thinner and higher in pitch: A, then D, then G at the bottom.
If you already know a little guitar, here is good news: those are the same note names as the four thickest strings on a guitar, just sounding an octave lower. An octave is the same note at a higher or lower pitch. Sing a low note and then the same note higher, and you have jumped an octave.
How to Remember It
Use a silly sentence where each word starts with the string's letter, top to bottom:
- Eat All Day, Gary
- Elephants And Donkeys Grow
Say it out loud while you pluck each open string (an open string is one you play without pressing any fret). After a week of doing this, you will never need the sentence again.
How Notes Are Laid Out on the Fretboard
Every fret raises a string's pitch by a half step, the smallest distance in Western music. One fret equals one half step. Two frets equal a whole step.
So on the E string, the open string is E, the 1st fret is F, the 3rd fret is G and the 5th fret is A. Notice that last one: the 5th fret of the E string gives you the same note as the open A string below it. That pattern repeats across standard tuning:
- 5th fret of the E string = open A
- 5th fret of the A string = open D
- 5th fret of the D string = open G
That even spacing is what makes standard tuning so friendly. Any shape you learn on one string pair works on the next pair too. Move a pattern one string down and it simply starts on a different note.
Two other landmarks are worth memorising early:
- The 12th fret (usually marked with a double dot) is one octave above the open string. The notes start over from there.
- The octave shape: from any note on the E or A string, go two strings down and two frets higher and you land on the same note an octave up. For example, G at the 3rd fret of the E string becomes G at the 5th fret of the D string.
Use the interactive fretboard on this site to see these patterns light up. Seeing the same note appear in several places is the moment the neck stops looking like a maze.
What the Bass Does in a Band
The bass has two jobs, and they happen at the same time.
First, it is part of the rhythm section. Good bass players lock in with the drummer, especially the kick drum. When the kick and the bass land together, the band feels tight and the groove makes people move.
Second, it outlines the harmony. Most of the time, the bass plays the root of each chord, the note the chord is named after. If the guitarist plays a G chord, you will often play a G. That gives the music a solid floor to stand on. Once you are comfortable, you start connecting roots with passing notes and little melodic runs.
Listen to almost any band and focus only on the lowest part. You will notice the bass rarely shows off. It supports, pushes and steers. That is the art of it.
Alternate Tunings: Drop D and Open D
Besides standard tuning, this site covers two alternate tunings. Both change the lowest-sounding strings, so they change how familiar shapes feel.
Drop D (D, A, D, G)
Here you lower only the top E string by a whole step, two frets' worth, down to D. The other three strings stay the same.
What changes: you gain a lower note at the bottom of your range, and that string now matches the open D string an octave lower. Every note on the top string sits two frets higher than you are used to; the G that lived at the 3rd fret is now at the 5th. Drop D is popular in heavier rock styles because that low D sounds big and lets you play fast, punchy riffs on the bottom strings with one finger.
Open D (D, A, D, F#)
This one changes two strings. The top string drops to D, as in Drop D, and the bottom string is lowered a half step, one fret, from G to F#.
Why? Strum all four open strings and you hear D, A, D and F#, the notes of a D major chord. The bass is tuned to a chord. It is less common on bass than on guitar, but it opens up ringing open-string sounds and chord-like patterns that are awkward in standard tuning. Remember that anything you play on the bottom string now sits one fret higher than before.
Your First Practice Session
Tune to standard and play each open string slowly, saying its name: E, A, D, G. Then find the 5th-fret matches between neighbouring strings and listen for the two notes sounding identical. Finally, put on a simple song you love, find its lowest note, and just play that root along with the kick drum for a full minute. Feel how it locks in. That feeling is what bass playing is all about, and you have just started.