The Guitar Neck from End to End
A standard guitar neck has between 19 and 21 frets, each representing a semitone. From the open string to the highest fret, each string spans more than an octave and a half. With 6 strings, the guitar covers a total of more than 4 octaves, making it one of the most complete harmonic instruments.
One important fact: the 12th fret always produces the same note as the open string, only one octave higher. This means the note pattern from frets 1 to 12 repeats identically from frets 13 to 24. Knowing this principle cuts the work of memorizing the neck in half.
Use the <a href="/ferramentas/afinador/">Cantivy Online Tuner</a> to check the notes as you explore the neck — playing a note and confirming it instantly is the most efficient way to build a mental map of the instrument.
Notes on the First 12 Frets
Below are the notes on each string, from open (fret 0) through the 12th fret. Notice that the 12th fret reproduces the same note as the open string, one octave higher — confirming the repetition principle.
Notes with # (sharp) may also be called by their b (flat) names — they are enharmonic equivalents. For example, F# and Gb are the same note.
- String 6 (E): E F F# G G# A A# B C C# D D# E
- String 5 (A): A A# B C C# D D# E F F# G G# A
- String 4 (D): D D# E F F# G G# A A# B C C# D
- String 3 (G): G G# A A# B C C# D D# E F F# G
- String 2 (B): B C C# D D# E F F# G G# A A# B
- String 1 (E): E F F# G G# A A# B C C# D D# E
Octave Patterns
Octave patterns are visual shortcuts for finding the same note in different positions on the neck. The most useful pattern is this: a note on string 6 at a given fret also appears two strings below (string 4) and 2 frets higher. For example, G at the 3rd fret of string 6 also appears at the 5th fret of string 4.
Another pattern: a note on string 5 appears on string 3 with the same offset (+2 frets). A note on string 4 appears on string 2 with an offset of +3 frets (because of the special tuning between strings 3 and 2).
Mastering octave patterns lets you "see" the entire neck as a grid of related notes, making improvisation and melody writing much easier.
Memorizing with the CAGED System
The CAGED system is a powerful method for mapping the entire guitar neck. It is based on 5 open chord shapes (C, A, G, E, D) that, when connected, cover the full neck. Each shape also reveals the position of a scale and the note patterns around it.
To use CAGED for memorizing notes: choose a note (e.g., G) and locate where it appears as the root in each of the 5 shapes. This anchors the note in 5 different positions on the neck, creating a three-dimensional map of the instrument.
The CAGED system takes time to master, but it is one of the most worthwhile investments for an intermediate guitarist. Start with the E shape (an open E major chord) and its associated scale pattern — it is the most commonly used position in rock and Brazilian sertanejo.
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