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Chord Tones

Arpeggio Explorer

Master chord tones across the fretboard

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A Add9

Major triad + 9th

Triads4 notes

Notes

A (Root)C#EB

Mood & Info

Bright, modern, colorful

4 notes per octave

Interactive Fretboard

Root Chord Tones
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
E
B
G
D
A
E

Click on any highlighted note to hear it play

Root Note
Chord Tones
Click any note to hear it

Common Patterns

Root Position

Low to High

Start on root note, ascend through chord tones

1st Inversion

3rd in bass

3rd of chord as lowest note

2nd Inversion

5th in bass

5th of chord as lowest note

3rd Inversion

7th in bass

7th of chord as lowest note (for 7th chords)

Spread Voicing

Wide intervals

Notes spread across multiple octaves

Close Voicing

Compact

All notes within one octave

A Add9 is a triads arpeggio from the bright, stable major family. Major triad with an added 9th — lush and colorful. The Add9 arpeggio contains 4 notes: A, C#, E, B. With a formula of 1-3-5-9, it adds a 7th to the triad, creating a richer harmonic palette. This arpeggio is suitable for intermediate players building their vocabulary.
The A Add9 arpeggio is constructed using the interval formula 1-3-5-9, which means it contains the intervals Root (1), Major Third (3), Perfect Fifth (5), Major Ninth (9) above the root A. The notes are A, C#, E, B. An arpeggio differs from a scale in that it uses only the chord tones — the notes of the underlying chord played sequentially rather than simultaneously. The major arpeggio uses the root, major third, and perfect fifth — the same notes as the major triad. Key characteristics: Pop, Rock, Acoustic.
A Add9 sounds bright, stable, and consonant. The major third (C#) gives it its characteristic happy quality, while the perfect fifth (E) provides harmonic stability. The additional notes (B) add richness and color. The emotional feeling is one of brightness, resolution, and arrival. This arpeggio is the building block of Western harmony and appears in virtually every genre.
A Add9 works best in Pop, Rock, Acoustic music. Use it to outline major chord progressions with clean, consonant lines. It works beautifully as a melodic foundation for I-IV-V and I-V-vi-IV progressions. Compatible scales for soloing: 1. Major Scale 2. Major Pentatonic Related arpeggios: - Major Triad - Major 9th
Practice Routine for A Add9: 5 minutes: Play each note of the A Add9 arpeggio slowly, one at a time. Listen carefully to how each note relates to the root. Ascending and descending through the arpeggio. Focus on clean, even tone. 10 minutes: Practice the arpeggio with a metronome at 60 BPM. Play one note per beat ascending, then descending. Gradually increase to eighth notes and sixteenth notes. Focus on timing precision and smooth string transitions. 20 minutes: Apply the arpeggio over a backing track in A. Improvise melodies using only the Add9 arpeggio notes, connecting them with scale passages. Experiment with different rhythmic patterns, slides, and vibrato. 30 minutes: Learn the arpeggio in multiple positions across the fretboard. Connect different positions with smooth transitions. Practice the arpeggio over a chord progression. Record yourself and analyze your phrasing. Common Mistakes to Avoid: - Playing too fast before understanding the arpeggio's sound - Not connecting the arpeggio notes smoothly (arpeggios should flow) - Ignoring the arpeggio's relationship to the underlying chord - Skipping the descending practice — descending arpeggios are equally important Intermediate Tips: Learn the arpeggio in at least 3 positions. Practice connecting positions smoothly. Try combining arpeggios with scale passages.

Frequently Asked Questions

What is the A Add9 arpeggio?
A Add9 is a triads arpeggio consisting of 4 notes: A, C#, E, B. The formula is 1-3-5-9. Major triad with an added 9th — lush and colorful.
What notes are in the A Add9 arpeggio?
The A Add9 arpeggio contains the notes A, C#, E, B. These correspond to the formula 1-3-5-9, which represents the intervals Root (1), Major Third (3), Perfect Fifth (5), Major Ninth (9) above the root A.
What is the formula for the A Add9 arpeggio?
The formula for the A Add9 arpeggio is 1-3-5-9. This means it uses the Root (1), Major Third (3), Perfect Fifth (5), Major Ninth (9) intervals from the root note A.
How do you play the A Add9 arpeggio on guitar?
To play the A Add9 arpeggio on guitar, start at the root note A and follow the fretboard pattern. Each note corresponds to a specific fret. Use the interactive fretboard diagram above to see all positions and fingerings.
What is the A Add9 arpeggio used for?
A Add9 is commonly used in Pop, Rock, Acoustic, Worship music. It works well for outlining major chord progressions with clean, consonant lines.
What scales work with the A Add9 arpeggio?
Scales that work well with the A Add9 arpeggio include Major Scale, Major Pentatonic. The arpeggio notes are the chord tones, so any scale containing these notes will work.
What's the difference between an arpeggio and a chord?
An arpeggio plays the notes of a chord one at a time (sequentially), while a chord plays all notes simultaneously. The A Add9 arpeggio uses the same notes as the A Add9 chord, but played as a melody rather than strummed.

Add9 in Other Keys

C Add9
C# Add9
D Add9
D# Add9
E Add9
F Add9
F# Add9
G Add9
G# Add9
A# Add9
B Add9