The cavaquinho is a four-string instrument strongly associated with samba, choro, and pagode. On this page, you can view scales directly on the instrument’s fretboard and choose any key to study its notes and intervals.
The tuning used by the tool is D G B D, or D, G, B, D, from the lowest string to the highest.
This is a common tuning for the Brazilian cavaquinho, although the instrument can also be found in other tunings.
How D G B D tuning organizes the fretboard
The four open strings are:
D – G – B – D
The first and fourth strings have the same note, separated by one octave.
This creates a useful symmetry for studying the fretboard: any note found at a particular fret on one of the D strings also appears at the same fret on the other D string, one octave above or below.
For example, if the fifth fret of the low D string contains G, the fifth fret of the high D string also contains G.
This relationship helps you quickly recognize scale shapes and transfer short phrases between the two ends of the instrument.
Relationship to the guitar
Anyone who already plays guitar will find some familiar references.
In standard guitar tuning, the D, G, and B strings also appear in this sequence. This means that relationships between notes and small shapes using those three strings can be recognized on the cavaquinho.
But the instrument should not simply be treated as a guitar with two fewer strings.
The cavaquinho’s fourth string is another D, and that difference changes how scales, chords, and phrases are distributed across the fretboard.
It is therefore best to use guitar knowledge only as a reference point and learn the cavaquinho fretboard according to its own tuning.
How to study scales on the cavaquinho
A good way to begin is to choose a key and first locate every occurrence of the root.
Then observe the other scale degrees around it.
Instead of trying to memorize the entire fretboard at once, work with small regions of three, four, or five frets and look for:
- where the root is;
- which notes belong to the scale;
- where the third and fifth appear;
- how the same scale continues on neighboring strings;
- which notes repeat in other octaves.
The tool lets you view the complete fretboard and then restrict the region you are studying.
Scale degrees
In addition to note names, you can study using scale degrees.
In a major scale:
1 – 2 – 3 – 4 – 5 – 6 – 7
This way of reading is especially useful when you begin transposing melodies and phrases between keys.
A sequence such as 1 – 2 – 3 – 5, for example, keeps the same musical function in any key, even when the note names change.
Learning to see degrees on the fretboard can therefore be more useful than memorizing fixed positions alone.
Important scales on the cavaquinho
To get started, it is worth learning a few basic scales well:
- major scale;
- natural minor scale;
- major pentatonic;
- minor pentatonic;
- harmonic minor scale;
- chromatic scale, used mainly as a reference for passing and approach notes.
In samba and choro, major and minor scales often appear together with chromatic approach notes.
So, in addition to studying which notes belong to the scale, it is useful to observe the notes immediately above and below the main degrees.
Major scales and chords
When studying a major scale, pay special attention to degrees 1, 3, and 5.
They form the major triad built on the root and help connect the scale to the chords.
If you are studying C major, for example:
C – D – E – F – G – A – B
degrees 1, 3, and 5 are:
C – E – G
Recognizing these notes on the fretboard helps both accompaniment and the creation of short melodic phrases between chords.
Minor scales
In the natural minor scale, the third, sixth, and seventh are lowered in relation to the major scale.
The harmonic minor scale adds another important sound by raising the seventh again.
This creates a stronger pull between the seventh and the root and often appears in harmonic contexts involving minor keys.
Compare the natural minor and harmonic minor scales in the same key to see exactly which note changes.
No CAGED positions on the cavaquinho
The CAGED system was developed from the five open-chord shapes of a guitar in standard tuning.
The cavaquinho has four strings and a different interval layout, so those five shapes do not transfer directly to the instrument.
In this tool, study is based directly on the notes and intervals of the fretboard.
Choose a comfortable fret region and use it as a temporary position. Then move that region along the fretboard until you can connect the different scale shapes.
Use the whole fretboard as a reference
The goal of the diagram is not to present one correct way to play a scale.
Use it as a map.
Start from a root, find different paths to the octave, and compare how the same scale appears in other fretboard regions.
The more you connect these regions, the less you will depend on isolated shapes and the easier it will be to locate notes during a song.