Pedagogical Analysis · Harmonic Circle

Pedagogy & Analysis of the Bbm Minor Circle

Bbm — Gb — Ebm — F7

Meter4 / 4
Tempo85 BPM
CapoNo capo
StrummingAcoustic Pop #5

Written by CifraLab · 8 min read · 9 sections

Harmonic Circle and Tonal GravityOrbital diagram displaying fundamental bass gravity moving from tonic (I) to subdominant, dominant, and resolution.BASSFUNDAMENTALITONICviMINORiiPREPARATIONV7TRITONETONIC (I)TENSION (V7)RESOLUTION (I)
Fundamental bass gravity (I - vi - ii - V7) · CifraLab illustration

Listen to the whole journey

  1. Bbm
  2. Gb
  3. Ebm
  4. F7
  5. Bbm
Tap the button and follow the chords, then read each phase knowing how it sounds.

How the tension moves

1

Phase 1 • Diatonic Tonic

The Home (Tonic — Degree i)

Bbm

Tonal rest function (Riemann, 1893): Acts as the acoustic gravitational center and tonal anchor. All notes of the diatonic scale find stability in this chord. Playing Bbm establishes the consonant foundation of the key — generating neither tension nor urgency of movement.

Listen

  1. Bbm
It sounds calm, like a starting point that doesn't ask to go anywhere.
View fingering and notes for Bbm
2

Phase 2 • Subdominant and Relative

The Landscape (Relative Major and Subdominant — Degrees VI and iv)

Gb

Diatonic voice leading (Schoenberg, 1911): Moving to Gb brings the first bright colour into the minor key. Gb is the major chord on the sixth degree and shares two notes with Bbm, so the change stays smooth before the progression heads toward the dominant.

Listen

  1. Bbm
  2. Gb
From Bbm to Gb the color changes, but it remains calm because they share notes.
View fingering and notes for Gb
3

Phase 3 • Dominant with Tritone

The Adventure (Dominant — Degree V7)

Ebm → F7

Instability and harmonic pull (Rameau, 1722): The dominant chord F7 harbors the leading tone and the diatonic tritone interval. This internal dissonance produces the peak acoustic tension of the progression, and the ear waits for the return home.

Listen

  1. Ebm
  2. F7
It stops on F7 on purpose. Notice how it hangs in the air, asking to come back.
View fingering and notes for F7
4

Phase 4 • Authentic Cadence

The Return (Cadential Resolution)

Bbm

Release and resolution of tension: The descending fifth bass movement (F7 to Bbm) instantly dissolves all accumulated harmonic tension. The tritone resolves contrary-motion into the third and root of Bbm, completing the cycle with total acoustic balance.

Listen

  1. F7
  2. Bbm
Now, F7 returns to Bbm and the tension is suddenly released.
View fingering and notes for Bbm

Check it with your ear

Two short questions to solidify what you've just read. There's no grade or record, so if you get it wrong, you can listen again and try again.

Which chord creates the tension that asks to return to Bbm?

Listen to both endings. Which one sounds finished?

Try it on your guitar

Play and stay there for four beats without moving. Then play . That relief you feel is the resolution this lesson talks about. Repeat it three times and then try the whole circle at 85 BPM.

Inside the key of Bb minor

Bb minor is built from Bb, C, Db, Eb, F, Gb and Ab. It has five flats, Bb, Db, Eb, Gb and Ab.

Db major uses the same seven notes, which makes it the relative major. Compared with F minor, only one note changes, Gb becomes G.

In F7, the third A and the seventh Eb sit six semitones apart, a tritone. In the guitar shape of F7, A sounds on string 3, fret 2 and Eb on string 4, fret 1.

With a capo it also works with other shapes. You can play it with the Am shape and the capo at fret 1 or with the Em shape and the capo at fret 6.

Theoretical Foundations

All sources

Hear and practise this circle in context

The bass line and the tonal centre

Play Bbm alone, then play the four chords in order: Bbm – Gb – Ebm – F7.

Tonic, preparation and dominant

Apply that map to Bbm – Gb – Ebm – F7 rather than assuming that the same chord must play the same role in every song. Name the starting chord Bbm aloud; then pause after Gb and ask which note you still hear as home. Repeat after Ebm and after F7.

When the dominant contains a tritone

In this circle, F7 is a dominant seventh chord: the “7” in its symbol marks the added seventh. Its third and seventh form a tritone, an interval of three whole tones that creates tension toward Bbm. Play F7 → Bbm below and follow those two inner voices: the third rises by a semitone toward the tonic, while the seventh descends by step to a note in the tonic chord.

Listen

  1. F7
  2. Bbm
Now, F7 returns to Bbm and the tension is suddenly released.

Common tones and economical fingering

Move from Bbm to Gb slowly and listen for a pitch that can remain still; if there is none, listen for voices that move by the smallest intervals. Repeat with Gb to Ebm, Ebm to F7, and the return to Bbm.

A measured practice routine

First play Bbm – Gb – Ebm – F7 with one downstroke at the beginning of each measure.

Transpose without changing the functions

Compare the two versions by singing the first note of Bbm and then the first note of its counterpart in the new key.