Hard Bop · October 19, 2026
By Justin Comstock · JazzValve creator, longtime guitarist and adult trumpet learner · Updated October 22, 2026
Jazz Trumpet Enclosures: Aim for a Chord Tone
Learn to surround E and G with approach notes, place each target on a counted beat, and carry an original enclosure study into a chord change.
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Get Blue Lines freeAn enclosure makes a chosen note the destination of a short melodic detour. Instead of arriving directly on a chord tone, play a note above it and a note below it first. This lesson separates that idea from running a chromatic scale: you will choose the destination, place its arrival in time, and then add the surrounding notes.
All pitches and chord symbols below are written for B-flat trumpet. Written C7 sounds as concert B-flat7; written Cmaj7 sounds as concert B-flatmaj7. A standard B-flat trumpet sounds a major second below its written pitch, as shown in UTEP's instrument transposition reference. Check the accompaniment's concert key before playing. The transposition guide explains the conversion.
Start with the destination
Use a written C7 vamp, or practise without accompaniment. C7 contains C, E, G, and B-flat. Choose E4, the first line of the treble staff, as your target. It is the chord's major third.
Set a metronome to quarter note = 60–72 in 4/4, with one click per beat. Play E4 as a half note on beat 1, then rest on beats 3 and 4. Repeat four times. Hear the target before playing it.
Now compare three pitch sequences:
- D-sharp4–E4: one approach note from a half step below.
- F4–E4: one approach note from a half step above.
- F4–D-sharp4–E4: an enclosure, approaching the target from both sides.
In the last sequence, F and D-sharp each sit a half step from E. The notes are played in the order shown, not simultaneously. D-sharp is spelled that way here to show its upward movement into E; it shares a fingering with E-flat.
Jazzadvice's enclosure lesson describes surrounding a target with notes from above and below. Those surrounding notes can come from the scale, from chromatic half steps, or from a mixture. An enclosure does not have to use this exact three-note pattern.
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Exercise 1: Give the arrival its own beat
Read the note and rhythm transcript below. Staff notation requires JavaScript.
Notes, rhythm and playing instructions
- Bar 1: beat 1, chord C7, quarter rest; beat 2, F4 quarter note, fingering 1, sounds E-flat4; beat 3, D-sharp4 quarter note, fingering 2+3, sounds C-sharp4; beat 4, E4 quarter note, fingering 1+2, sounds D4.
- Bar 2: beat 1, chord C7, half rest; beat 3, half rest.
Show the chromatic enclosure F4–D#4–E4 with the target precisely on beat 4 and a complete silent bar. steady quarter-note pulse; no swing marking or invented rhythmic alteration Accompaniment reference. Bar 1: written C7 sounds concert Bb7. Bar 2: written C7 sounds concert Bb7. Tempo range 60–72; the score starts at 60. 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.
Use this original two-bar study over written C7 throughout. All notes are quarter notes unless marked otherwise.
| Bar | Beat 1 | Beat 2 | Beat 3 | Beat 4 |
|---|---|---|---|---|
| 1 | Quarter rest | F4 | D-sharp4 | E4 |
| 2 | Half rest begins | Continue rest | Half rest begins | Continue rest |
Bar 2 is simply four beats of silence. Count it without extending the pause. The target E4 arrives on beat 4 of bar 1. Do not squeeze the first two notes together or delay E because the D-sharp feels unfamiliar.
First sing the three pitches slowly. Then play them with an even sound. If the interval F–D-sharp is awkward, isolate that change without speeding up. Return to the complete rhythm once the notes speak clearly.
Repeat three cycles. On the fourth, play only E4 on beat 4 of bar 1, leaving the other beats silent. Comparing the decorated and undecorated versions helps you hear which note carries the arrival.
Exercise 2: Move the target to the next bar
Keep the C7 vamp and the same tempo. This time the enclosure leads across a barline:
- Bar 1: Rest for beats 1 and 2. Play F4 on beat 3 and D-sharp4 on beat 4, both quarter notes.
- Bar 2: Play E4 as a half note on beat 1. Rest on beats 3 and 4.
The target now arrives on beat 1 of bar 2. The enclosure begins before that arrival; it does not add extra beats to the measure.
For a shorter pickup, rest through beats 1–3 of bar 1 and play F4–D-sharp4 as two eighth notes on beat 4. Keep E4 on the next downbeat. Start with evenly divided eighths. Once the timing is secure, try the same pickup with swung eighths, using the swing rhythm lesson as a listening guide. Preserve the downbeat arrival.
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Exercise 3: Change the target, not the rhythm
Use Exercise 2's quarter-note rhythm, but target G4, the second line of the staff and the fifth of written C7. Replace F4–D-sharp4–E4 with:
A-flat4–F-sharp4–G4.
A-flat is a half step above G; F-sharp is a half step below. The first move sounds a whole step down, followed by a half step up. Do not assume that every movement inside an enclosure is a half step.
Alternate one two-bar cycle targeting E4 and one targeting G4. Both targets belong to C7, but they have different colors. Keep the same tempo and rests so the pitch change is what you hear.
These studies use a narrow written range, D-sharp4 through A-flat4. For valve combinations, consult Yamaha's octave-specific trumpet fingering chart. Sing any passage that is outside your comfortable range rather than forcing it.
Put one enclosure into a chord change
Try two bars of written G7 followed by two bars of written Cmaj7. The concert accompaniment is F7 for two bars, then B-flatmaj7 for two bars.
- Bar 1, G7: Rest for the full bar and listen.
- Bar 2, G7: Half rest, F4 quarter note, D-sharp4 quarter note.
- Bar 3, Cmaj7: E4 half note, half rest.
- Bar 4, Cmaj7: Whole-bar rest.
E is the third of the arriving Cmaj7 chord. F is a chord tone of G7; D-sharp supplies a brief chromatic approach into E. This is an original listening study, not a transcription or a rule that every dominant chord needs this treatment.
Compare it with the guide-tone lesson: in bar 2, play F4 as a half note on beats 3–4, leading directly into E4 on the next downbeat. On the next pass, shorten F4 to a quarter note and insert D-sharp on beat 4. Keep E on the same downbeat in both versions.
Finish by recording one plain arrival and one enclosure. Check the target pitch, its exact beat, and the length of the rests. If the extra notes obscure the arrival, simplify before adding another pattern.
For a broader practice plan, Blue Lines is a free jazz trumpet workbook available with email signup.
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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
- Jazzadvice: How To Effectively Use Enclosure — https://www.jazzadvice.com/lessons/how-to-effectively-use-enclosure/
- UTEP: Instrument Transpositions for Musical Analysis — https://utminers.utep.edu/charlesl/transpose.html
- Yamaha: Trumpet fingering chart — https://www.yamaha.com/en/musical_instrument_guide/common/images/trumpet/fingering.pdf