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B-flat Aeolian Mode
The B-flat Aeolian mode is the B-flat natural minor scale under its modal name: B-flat, C, D-flat, E-flat, F, G-flat, and A-flat. Let’s look at it on the keyboard and on the staff, with fingering for both hands, and hear where it sits among the seven modes.
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B-flat Aeolian mode overview
Visualize the B-flat Aeolian mode on the piano
On the keyboard, B-flat Aeolian uses B-flat, C, D-flat, E-flat, F, G-flat, and A-flat, with B-flat, D-flat, E-flat, G-flat, and A-flat on black keys, and B-flat again at the top. These seven notes are the D-flat major scale, started on its 6th note. The notes are shared, but the home note is B-flat, and that changes how the scale sounds.
What gives B-flat Aeolian its sound
The B-flat Aeolian mode and the B-flat natural minor scale are the same scale: the same notes, the same fingering, and the same sound. Aeolian is the name the natural minor takes when we place it among the modes.
It’s a useful reference point. Dorian, Phrygian and Locrian can each be heard as this scale with a note or two changed.
Play B-flat Aeolian on the piano
The two charts show the fingering one hand at a time. Each hand covers the seven notes in two positions, a group of three fingers (red) and a group of four (blue); a note in green is an extra note at the end of the scale, outside the two positions.
The right hand starts on B-flat with the 4th finger. Going up, the thumb passes under to C after the 4th finger on B-flat and to F after the 3rd finger on E-flat. The top B-flat is played with the 4th finger. This is the fingering of the B-flat natural minor scale.
The left hand starts on B-flat with the 2nd finger. Going up, the 3rd finger folds over the thumb from C to D-flat and the 4th finger folds over the thumb from F to G-flat. The top B-flat is played with the 2nd finger. This is the fingering of the B-flat natural minor scale.
The notes of B-flat Aeolian on the staff
On the staff, the eight notes climb by step from B-flat to B-flat, the right hand in the treble clef and the left hand an octave lower in the bass clef. B-flat Aeolian is written with the key signature of D-flat major: five flats (B-flat, E-flat, A-flat, D-flat, and G-flat). The key signature belongs to D-flat major, but here the line begins and ends on B-flat, and that’s what makes it B-flat Aeolian.
Play B-flat Aeolian up and down one octave
Next, B-flat Aeolian as we’ll practice it: up one octave and back down, one note per beat, ending on a half note. The fingering for the right hand is written above the notes and for the left hand below.
Practice B-flat Aeolian
The notes and fingering are those of the natural minor scale, so the hands usually know them already. What’s worth practicing is evenness and a clear sense of the minor home note. Let’s work on it in a few stages.
- Find the home note first: Before the scale, we play the B-flat minor chord and let it ring, then play the scale and end on the same chord. The aim is to keep B-flat as the center the whole way through.
- Compare with a neighbor: We play B-flat Aeolian and then B-flat Dorian, listening for the one note that changes. It shows how little it takes to move from one mode to the next.
- Hands separately, then together: Each hand alone first, slowly and evenly, with special attention to the thumb passing under to C and F in the right hand. Then hands together, an octave apart, keeping the pulse even.
- Shape the line: Once it’s steady, we let the scale grow a little toward the top and relax on the way down. It turns the scale into a phrase and keeps the ear involved.
Avoid common mistakes in B-flat Aeolian
A few things tend to go wrong in B-flat Aeolian:
- Hearing D-flat as home: Because the notes are those of D-flat major, the ear tends to treat D-flat as the center and B-flat as a passing note. Starting and ending firmly on B-flat, and playing the B-flat minor chord around the scale, keeps the mode’s own center clear.
- Uneven thumb notes: The thumb plays on its side and tends to land heavily, especially right after passing under. Letting the thumb travel early and arrive lightly keeps the line even.
Other techniques related to B-flat Aeolian:
- The D-flat major scale (the same notes, starting on D-flat)
- The B-flat natural minor scale (the same starting note)
- The Aeolian mode on every note
- The Complete Guide to Piano Modes