Jazz Theory · October 21, 2026
By Justin Comstock · JazzValve creator, longtime guitarist and adult trumpet learner · Updated October 22, 2026
Sus Chords in Jazz: A Trumpet Guide to the Suspended Sound
Compare sus4, 7sus4, and dominant sounds with clear chord spellings, concert-pitch equivalents, and two original trumpet exercises.
Free trumpet workbook
Blue Lines
Thirty days of focused B♭ trumpet practice: tone, time, jazz language and improvisation.
Email signup required
Get Blue Lines freeSus chords in jazz give you a different starting point from ordinary major, minor, and dominant chords. Instead of immediately identifying the sound through its third, begin by hearing the fourth above the root. On trumpet, one well-placed note can make that color clear.
This lesson follows the basic chord-symbol guide, which covers C7, Cmaj7, and Cm7. Here you will compare a suspended sound with a dominant sound, then practice leaving the suspension unresolved.
All exercise notes and their chord labels are written for B-flat trumpet. Written C sounds concert B-flat, one whole step lower. Written F4 sounds concert E-flat4, while written C5 sounds concert B-flat4. Concert accompaniment is labeled separately throughout.
Read the complete sus symbol
In a basic sus4 chord, the fourth replaces the third. Csus4 is C–F–G, compared with C major's C–E–G. A sus2 chord uses the second instead: Csus2 is C–D–G. Robert Hutchinson's introduction to sus chords explains these two spellings.
For this lesson, concentrate on sus4:
| Written symbol | Basic written notes | Concert equivalent |
|---|---|---|
| Csus4 | C, F, G | B-flatsus4 |
| C7sus4 | C, F, G, B-flat | B-flat7sus4 |
| C9sus4 | C, F, G, B-flat, D | B-flat9sus4 |
| C7, for comparison | C, E, G, B-flat | B-flat7 |
The 7 matters. Csus4 does not automatically specify B-flat; C7sus4 does. The 9 adds D to the seventh-chord sound. These are pitch collections, not instructions to play several notes simultaneously on trumpet.
A plain “sus” usually means sus4, so C7sus commonly means C7sus4. Open Music Theory's chord-symbol chapter describes that convention. Check the arrangement if its notation is unusual rather than silently rewriting it.
JazzValve
Practice This In JazzValve
Open in the app →
Hear one note change the character
Use written F4 and E4, adjacent notes near the bottom of the treble staff. Play each softly for two beats, separated by a two-beat rest. The written sound you are comparing is the fourth versus the major third of C.
Now hear those notes against actual harmony. Ask a pianist, or use a keyboard, to play concert B-flat–E-flat–F–A-flat for the suspended chord. Change only E-flat to D for concert B-flat–D–F–A-flat, the dominant seventh chord.
Over the first chord, play written F4. Over the second, play written E4. Listen to the accompaniment as well as your note. The small melodic move is easier to understand when you hear which chord changed underneath it.
You can practice without accompaniment, but the horn alone cannot demonstrate every part of a four-note voicing at once. Arpeggiate the written notes if you need to hear more of the chord.
Exercise 1: let the suspension resolve
Read the note and rhythm transcript below. Staff notation requires JavaScript.
Notes, rhythm and playing instructions
- Bar 1: beat 1, chord C7sus4, F4 quarter note, fingering 1, sounds E-flat4; beat 2, G4 quarter note, fingering open, sounds F4; beat 3, B-flat4 quarter note, fingering 1, sounds A-flat4; beat 4, G4 quarter note, fingering open, sounds F4.
- Bar 2: beat 1, chord C7sus4, C5 half note, fingering open, sounds B-flat4; beat 3, B-flat4 quarter note, fingering 1, sounds A-flat4; beat 4, F4 quarter note, fingering 1, sounds E-flat4.
- Bar 3: beat 1, chord C7, E4 half note, fingering 1+2, sounds D4; beat 3, B-flat4 quarter note, fingering 1, sounds A-flat4; beat 4, G4 quarter note, fingering open, sounds F4.
- Bar 4: beat 1, chord Fmaj7, A4 half note, fingering 1+2, sounds G4; beat 3, F4 quarter note, fingering 1, sounds E-flat4; beat 4, quarter rest.
Connect the suspended fourth F4 to E4, then land on Fmaj7 third A4. Steady quarter-note pulse; no invented swing interpretation. Accompaniment reference. Bar 1: written C7sus4 sounds concert Bb7sus4. Bar 2: written C7sus4 sounds concert Bb7sus4. Bar 3: written C7 sounds concert Bb7. Bar 4: written Fmaj7 sounds concert Ebmaj7. Concert pitches in the transcript are references only; play the written pitches on B-flat trumpet. No audio playback or fixed swing ratio is implied.
This original four-bar study uses 4/4, with a metronome around quarter note = 60. Written harmony is two bars of C7sus4, one bar of C7, then one bar of Fmaj7. The concert accompaniment is B-flat7sus4, B-flat7sus4, B-flat7, E-flatmaj7.
- Bar 1, C7sus4: F4 quarter note, G4 quarter note, B-flat4 quarter note, G4 quarter note.
- Bar 2, C7sus4: C5 half note, B-flat4 quarter note, F4 quarter note.
- Bar 3, C7: E4 half note, B-flat4 quarter note, G4 quarter note.
- Bar 4, Fmaj7: A4 half note, F4 quarter note, quarter rest.
Each bar has four beats. Take a breath in bar 4's rest before repeating. The key listening moment is F4 at the end of bar 2 moving to E4 at the beginning of bar 3. Keep both notes equally clear; do not hurry past F to reach the more familiar third.
For a concert-pitch check, the exercise's written E4, F4, G4, A4, B-flat4, and C5 sound D4, E-flat4, F4, G4, A-flat4, and B-flat4 respectively.
JazzValve
Practice This In JazzValve
Open in the app →
A sus chord does not always need that ending
A suspended harmony can remain in place as the main sound of a passage. You do not have to force every C7sus4 into C7, or treat F as a mistake waiting to be corrected.
There is also a difference between spelling a basic chord and deciding what a soloist may play. The basic spelling above omits E, but E is not universally forbidden in an improvised line. Voicing, register, phrasing, and the musical context affect its sound. Jazzadvice's lesson on sus harmony discusses this important distinction.
For a first study, leave E out so you can hear the suspended color clearly. Later, try it deliberately and compare the result. A temporary practice limit is more useful than a permanent “wrong note” rule.
Exercise 2: keep the suspended color
Hold written C7sus4 for all four bars, or concert B-flat7sus4 in the accompaniment. Use the same tempo and 4/4 meter.
- Bar 1: quarter rest, F4 quarter note, G4 quarter note, B-flat4 quarter note.
- Bar 2: C5 half note, G4 quarter note, quarter rest.
- Bar 3: B-flat4 quarter note, G4 quarter note, F4 half note.
- Bar 4: quarter rest, F4 eighth note and G4 eighth note on beat 2, B-flat4 quarter note on beat 3, G4 quarter note on beat 4.
Play the eighth notes evenly at first. If you later use a swing accompaniment, match its feel without changing the number of beats.
Repeat the loop without inserting E. On another pass, substitute written D5 for bar 4's B-flat4. D is the ninth of C, sounding concert C5. For that pass, use written C9sus4 harmony, or concert B-flat9sus4. Compare the ninth with the more basic chord tones.
Read slash chords and alterations carefully
You may encounter B-flat/C: a B-flat major triad over a C bass. Its notes are C, B-flat, D, and F, giving a C9sus4 sound without the fifth G. For concert accompaniment, transpose both sides of the slash: A-flat/B-flat. Not every slash chord is a sus chord; spell its actual notes first.
Likewise, C7sus4(b9) calls for D-flat rather than the natural ninth D. Today's added-ninth variation is not a universal answer for every sus symbol.
Finish by recording both exercises. Can you hear the first one's F-to-E change and the second one's sustained suspended character? That comparison is the goal. More scale options can wait until those two sounds are distinct.
For another practice resource, JazzValve's workbook is available with email signup.
JazzValve
Practice This In JazzValve
Open in the app →
Free trumpet workbook
Blue Lines
Thirty days of focused B♭ trumpet practice: tone, time, jazz language and improvisation.
Email signup required
Get Blue Lines freeSources
- Robert Hutchinson, Music Theory for the 21st-Century Classroom, Simple Sus Chords: https://musictheory.pugetsound.edu/mt21c/SimpleSusChords.html
- Megan Lavengood, Open Music Theory, Chord Symbols: https://pressbooks.nebraska.edu/openmusictheory/chapter/chord-symbols/
- Eric O'Donnell, Jazzadvice, Mastering Sus Chords: Adding Options to Your Arsenal: https://www.jazzadvice.com/lessons/mastering-sus-chords-adding-options-to-your-arsenal/