Join Now

Start free trial

I let a song go out of my heart

Table of Contents

Introduction

Duke Ellington’s “I Let a Song Go Out of My Heart” stands as a landmark composition in jazz history, renowned for its beautiful melody and rich harmonic texture. This analysis focuses on three interpretations: the original Duke Ellington recording, a version featuring Ella Fitzgerald, and Thelonious Monk’s innovative take. Through examining melody, harmony, rhythmic structure, and improvisational techniques, we reveal how this classic song evolves across performances and provides a rich study for jazz musicians and enthusiasts.

Download the JVL workbook and let’s get to work!

Course

START NOW FOR FREE

Summary

Understanding the Original Recording by Duke Ellington

Song Structure and Key

The song employs a classic AABA 32-bar form, grounded in the key of D-flat major. The harmonic foundation is centered on the tonic chord, typically voiced as a major 6 chord (), which was stylistically appropriate during the era of the song’s composition. Modern performances often substitute this with a major 7 chord for a smoother sound, but Ellington’s original melody favors the major 6 to avoid dissonance from the lowered seventh interval.

Harmonic Progression and Chord Functions

The harmony extensively makes use of ii–V–I progressions, a staple in jazz harmony. The breakdown is as follows:

  • The tonic chord: I6=Db6
  • Use of two successive ii–V progressions, such as a ii–V of ii:

    F-7→Bb7→Eb-7→Ab7→Db6

    where Bb7 acts as the dominant of Ebmin7, the ii chord in D-flat major.
  • Modulations and harmonic shifts include subtle tritone substitutions, notably with chords like A acting as a sub-five for A.
  • A unique harmonic shift occurs moving into a flat-third minor (E-7 or enharmonically Fb-7), adding color and complexity to the otherwise diatonic progression.

Bass Line and Melodic Voice Leading

The bass lines primarily follow strong root movements reinforcing the harmonic framework. Guide tones such as the third and seventh receive particular attention in voice leading:

  • The seventh of the ii chord typically resolves down by a half step to the third of the V chord.
  • The third of the ii chord becomes the seventh of the V chord, ensuring smooth transitions.

Such voice leading enables strong melodic integrity within the harmony, foundational to both comping and solo improvisation.

The Ella Fitzgerald Interpretation: Melodic and Harmonic Variations

Transposition and Vocal Phrasing

Ella Fitzgerald’s version transposes the song to A-flat major to accommodate vocal range and stylistic interpretation. This key change necessitates adapting the solfĂšge system accordingly, making A♭ the tonic (“do”). The tempo slows and the feel adopts a more bluesy nuance, allowing for expressive phrasing and rhythmic flexibility.

Ella’s vocal delivery is characterized by a laid-back timing and tasteful embellishment, bending and extending melody notes to match the lyrical content. Notable melodic deviations include:

  • Emphasizing intervals like the flat seventh and the sharp ninth for a blues-inflected sound.
  • Syncopated rhythms and slight melodic expansions to fit the words.

Extended Harmonic Vocabulary

While closely following the original harmonic roadmap, Fitzgerald’s version introduces:

  • The use of a IV7 chord (Db7 in the key of ) to add a bluesy flavor not present in the original.
  • Additional turnaround progressions such as I6→V7/II→II-7−V7 enriching the harmonic texture.
  • Tritone substitutions for dominant chords, maintaining harmonic tension while varying the color.

Overall, the harmonic progression remains recognizable but more sophisticated, demonstrating how jazz evolves through vocal interpretation.

Thelonious Monk’s Version: Harmonic Innovation and Improvisational Approach

Key and Simplified Harmonic Structure

Monk’s interpretation shifts the key to E-flat major, a common choice in jam sessions. His harmony retains the core form but introduces simplifications and alterations:

  • Sometimes condenses multiple ii–V progressions into a single longer ii–V phrase, illustrating greater fluidity.
  • Modifies the bridge harmony by skipping some descending bass lines and re-voicing the chords to maximize tension and release.
  • Converts diatonic minor chords into dominant chords for more dynamic harmonic movement, e.g., transforming F♯-7 into a dominant chord () moving to .

 

Bass Lines and Improvisation

Monk’s version encourages flexible bass playing, sometimes performing full-length ii–V progressions, other times compressing or ornamenting them with chromatic approach notes. This interplay between bassist and soloist allows open interpretation and adds rhythmic interest.

Essential Jazz Theory Concepts Explored through the Song

Voice Leading in Arpeggios

Understanding the voice leading of arpeggios within ii–V–I progressions is crucial. Key voice-leading rules include:

  • The seventh of the chord descending by half-step to the third of the target chord.
  • The third remaining stable becomes the seventh of the next chord.
  • Maintaining common tones between chords to smooth transitions.

 

For example, in a ii–V in F:

                                     F (7th of Gm7)→ E (3rd of C7)

                                    Bb (3rd of Gm7)→ Bb (7th of C7)

 

Substituting the Root and Fifth with Extensions

In modern jazz comping and arranging, musicians often substitute:

  • The root of a chord with the ninth (9th) for a richer sound.
  • The fifth with the thirteenth (13th) to introduce color and chromaticism.

 

These substitutions, particularly on dominant chords, add tension and voice leading complexity, for example a  chord could be voiced as:

C (1), E (3), Bb (b7), D (9), A (13)

 

The Role of Flat 9 and Flat 13 on Dominant Chords

Flat ninth () and flat thirteenth () alterations create compelling chromatic lines within dominant chords. These tensions resolve naturally into the following chords, making them staples in bebop and post-bop vocabulary.

For example, on a  chord:

  • acts as the , adding dissonance that resolves down to .
  • acts as , providing a colorful texture resolving to G, the ninth of the F chord.

Practicing “I Let a Song Go Out of My Heart”: Scales and Soloing

Bebop Scales and Chromatic Passing Tones

The lesson concludes with practical applications of bebop scales (eight-note scales combining diatonic and chromatic tones) for improvisation. Typical usage involves:

  • Playing the major 7 bebop scale over the tonic chord, for example, the E-flat major bebop scale:

    {Eb, F, G, Ab, Bb, B, C, D}

  • Using chromatic passing tones between chord tones to create rhythmic momentum, such as passing from the fifth to the sixth via chromatic notes.

 

Applying Arpeggios with Voice Leading

Practicing arpeggios with voice leading helps internalize chord tones and smooth transitions during improvisation. Exercises might include:

  • Starting on root position arpeggios and moving to inversions.
  • Emphasizing guide tones (third and seventh) for melodic coherence.
  • Incorporating 9th or 13th extensions for modern jazz sounds.

Conclusion: A Holistic Jazz Learning Experience

This comparative and analytical journey through Duke Ellington’s “I Let a Song Go Out of My Heart” illuminates its harmonic sophistication and melodic beauty. Through exploring multiple versions—original, Ella Fitzgerald’s vocal interpretation, and Monk’s inventive piano rendering—musicians gain insights into jazz harmony, voice leading, chord substitutions, and improvisational vocabulary.

The fusion of theoretical understanding with practical exercises on bass lines, arpeggios, and bebop scales equips students with versatile tools to approach the jazz standard both as performers and composers.

Frequently Asked Questions

1. Why does Duke Ellington prefer a major 6 chord instead of a major 7 on the tonic?
The major 6 chord avoids the dissonance created by the flat 9  interval against the melody, producing a cleaner harmonic sound aligned with the original melody.

2. What is a ii–V–I progression and why is it important?
It is a common jazz chord progression involving a minor 7 chord built on the 2nd scale degree (II-7), a dominant 7 chord on the 5th (V7), resolving to the tonic chord (I). It forms the harmonic backbone of countless jazz standards.

3. How does the tritone substitution work in this song?
The tritone substitution replaces a dominant chord with another dominant chord a tritone away, e.g., A7 for E7, creating chromatic  voice leading and harmonic interest.

4. What role do flat 9 and flat 13 tensions play on dominant chords?
They add chromatic color and tension, which resolve naturally to the next chord, enhancing melodic lines and harmonic complexity.

 

Harness these insights, listen attentively to different versions, and immerse yourself in playing and improvising this timeless jazz masterpiece.

Keep swinging!

Leave a Reply

Recent Standards studies

WATCH ALL OUR STANDARDS STUDIES

Terms of Service | Privacy Policy

Masterclass​ in Paris, Saturday June 20th

Save your spot