Scales · September 12, 2026
By Justin James · Jazz trumpet player and founder of JazzValve · Updated September 13, 2026
Learn the written G blues scale on B-flat trumpet with an octave-specific fingering chart, a descending pattern, and short jazz practice drills.
When playing this material on a B♭ trumpet, I treat the notes as written pitches sounding in concert F.
The written G blues scale trumpet fingerings are G — open, B♭ — 1, C — open, D♭ — 1+2, D — 1, F — 1, G — open, starting on second-line G. These are written pitches for B♭ trumpet; therefore, this scale sounds in concert F, not concert G.
The blues scale used here is the six-note minor blues scale. Its formula is 1–♭3–4–♭5–5–♭7, giving you G–B♭–C–D♭–D–F, then G again to complete the octave.
Use this chart from G on the second line of the treble staff to G just above the staff:
| Written note | Staff position | Valve fingering | |---|---|---| | G4 | Second line | Open | | B♭4 | Third line | 1 | | C5 | Third space | Open | | D♭5 | Fourth line, lowered a half step | 1+2 | | D5 | Fourth line | 1 | | F5 | Fifth line | 1 | | G5 | Space just above the staff | Open |
Open means no valves pressed. Valve 1 is closest to your mouthpiece; valve 3 is closest to the bell.
The octave matters: low D below the staff normally uses 1+3, but the D in this chart uses 1. Likewise, the D♭ shown here uses 1+2, not the 1+2+3 fingering used for low D♭.
Start with this complete pattern:
Up: G–B♭–C–D♭–D–F–G Valves: open–1–open–1+2–1–1–open
Down: G–F–D–D♭–C–B♭–G Valves: open–1–1–1+2–open–1–open
Set a metronome to 60 bpm and play one note per beat. Hold the final G for four beats, then breathe before descending. Aim for an even sound rather than speed.
Notice that D and F both use valve 1. Their pitch difference comes from changing the vibrating frequency of your lips and the air support, not from moving a valve. Hear each note before playing it, and avoid forcing the upper notes with extra mouthpiece pressure.
If the upper G is not comfortable yet, practice G–B♭–C–D♭–D and return to G. Add F and upper G when you can keep the sound relaxed.
D♭ is the flattened fifth, often called the blue note. For an easy starting sound, use it as a short passing note between C and D:
C–D♭–D–C | B♭–G
Finger it:
open–1+2–1–open | 1–open
Play the first four notes as eighth notes, then B♭ and G as quarter notes. Keep the D♭ brief and let the final G feel settled.
Repeat slowly with light tonguing. Then slur just C–D♭–D, keeping your fingers close to the valve buttons. Press both valves together for D♭ so the transition stays clean.
A scale becomes useful when you can make phrases without always starting on its lowest note. Try this two-bar call-and-response drill in 4/4:
Repeat the phrase, then change only the rhythm. Leave the rest in place: that gap gives you time to breathe and hear your next idea.
Use a concert F blues backing track with this written G scale. If a track is labeled concert G, you need a written A blues scale instead.
1. One minute: Play the scale slowly, checking written notes against the chart. 2. One minute: Descend with steady timing and connected air. 3. One minute: Loop C–D♭–D, then rest between repetitions. 4. Two minutes: Play the two-bar phrase and invent rhythmic variations.
Open the JazzValve G blues scale practice screen for focused work in this key. To practice the same scale formula with different fingerings, try C Blues Scale Trumpet Fingerings and a Simple Improv Drill.