Tool
The harmonic field of B♭ minor 5 flats in the key signature. Click a degree to hear it, or hear the whole field.
Triads · natural minor B ♭ m i Tonic Diatonic C dim ii° Subdominant Diatonic D ♭ III Tonic Diatonic E ♭ m iv Subdominant Diatonic F m v Dominant Diatonic G ♭ VI Tonic Diatonic A ♭ VII Dominant Diatonic
Degree Symbol Notes Function i B ♭ m B♭ · D♭ · F Tonic ii° C dim C · E♭ · G♭ Subdominant III D ♭ D♭ · F · A♭ Tonic iv E ♭ m E♭ · G♭ · B♭ Subdominant v F m F · A♭ · C Dominant VI G ♭ G♭ · B♭ · D♭ Tonic VII A ♭ A♭ · C · E♭ Dominant
Seventh chords · natural minor B ♭ m7 i7 Tonic Diatonic C m7 ♭5 iiø7 Subdominant Diatonic D ♭ maj7 IIImaj7 Tonic Diatonic E ♭ m7 iv7 Subdominant Diatonic F m7 v7 Dominant Diatonic G ♭ maj7 VImaj7 Tonic Diatonic A ♭ 7 VII7 Dominant Diatonic
Degree Symbol Notes Function i7 B ♭ m7 B♭ · D♭ · F · A♭ Tonic iiø7 C m7 ♭5 C · E♭ · G♭ · B♭ Subdominant IIImaj7 D ♭ maj7 D♭ · F · A♭ · C Tonic iv7 E ♭ m7 E♭ · G♭ · B♭ · D♭ Subdominant v7 F m7 F · A♭ · C · E♭ Dominant VImaj7 G ♭ maj7 G♭ · B♭ · D♭ · F Tonic VII7 A ♭ 7 A♭ · C · E♭ · G♭ Dominant
Triads · harmonic minor B ♭ m i Tonic Diatonic C dim ii° Subdominant Diatonic D ♭ aug III+ Tonic Diatonic E ♭ m iv Subdominant Diatonic F V Dominant Diatonic G ♭ VI Tonic Diatonic A dim vii° Dominant Diatonic
Degree Symbol Notes Function i B ♭ m B♭ · D♭ · F Tonic ii° C dim C · E♭ · G♭ Subdominant III+ D ♭ aug D♭ · F · A Tonic iv E ♭ m E♭ · G♭ · B♭ Subdominant V F F · A · C Dominant VI G ♭ G♭ · B♭ · D♭ Tonic vii° A dim A · C · E♭ Dominant
Seventh chords · harmonic minor B ♭ m(maj7) imaj7 Tonic Diatonic C m7 ♭5 iiø7 Subdominant Diatonic D ♭ maj7 ♯5 IIImaj7#5 Tonic Diatonic E ♭ m7 iv7 Subdominant Diatonic F 7 V7 Dominant Diatonic G ♭ maj7 VImaj7 Tonic Diatonic A dim7 vii°7 Dominant Diatonic
Degree Symbol Notes Function imaj7 B ♭ m(maj7) B♭ · D♭ · F · A Tonic iiø7 C m7 ♭5 C · E♭ · G♭ · B♭ Subdominant IIImaj7#5 D ♭ maj7 ♯5 D♭ · F · A · C Tonic iv7 E ♭ m7 E♭ · G♭ · B♭ · D♭ Subdominant V7 F 7 F · A · C · E♭ Dominant VImaj7 G ♭ maj7 G♭ · B♭ · D♭ · F Tonic vii°7 A dim7 A · C · E♭ · G♭ Dominant
The notes are spelled in octave 4, from B♭4. The function is assigned by degree — tonic on I, III and VI; subdominant on II and IV; dominant on V and VII — which is how the harmonic field is taught. Context can change that reading, and the tool reports the degree.
Related keys D♭ major Relative: the same key signature, in the other mode. B♭ major Parallel: the same tonic, in the other mode. B♭m in the dictionary The tonic triad: notes, staff, keyboard and guitar shapes. Read about Diatonic harmony The chords that arise from stacking thirds on each degree of a scale, and why each quality lands where it does. Harmonic function The role each degree plays — tonic, subdominant, or dominant — and the tension that moves one to the next. Roman numeral analysis The notation that describes a chord by the position it occupies in the key rather than by the note it sits on. Minor key harmony The minor harmonic field, which is not one field: the three minor scales produce different chords on the same degree. 
