Map it slowly
Find B on string 6 at fret 7. Play string 6, fret 7; string 6, fret 10; string 5, fret 8; string 4, fret 7; string 4, fret 9. Use a relaxed position and release pressure between repetitions. String 1 is high E.
Arpeggio · Bm7♭5 · Guitar
Bm7♭5 arpeggio on guitar
The Bm7♭5 arpeggio is B – D – F – A — chord tones 1 ♭3 ♭5 ♭7. Bm7♭5 is the iiø chord of a minor ii–V–i; its sound is dark, unstable, leading. Below, every B, D, F, A on the fretboard is marked, with the root in gold. Press play to hear a one-octave arpeggio, or tap any note.
Visualizer
Bm7♭5 on the fretboard.
Guitar · standard tuning
Piano
RootChord toneBeing played
Tempo100 bpm
Show
Sound
Play loops the arpeggio up and down one octave (switch Loop off for a single pass) in the position starting at fret 7. Tap any marked note to hear it. “Show” switches or combines the fretboard and keyboard; “Sound” picks the instrument you hear. Audio is synthesized in the browser.
Your next 10 minutes
Make B Half-diminished (m7♭5) part of your playing
Make a short phrase
Play B – D – F – A in quarter notes at 60 bpm. Repeat starting from D, wrapping back to B. Do not speed up until every attack is even.
Hear it in context
Alternate D and A above a sustained B. These are degree ♭3 and ♭7. End a four-bar phrase on either one instead of always returning to the root.
Listen for this: Bm7♭5 has the colour “dark, unstable, leading”. Name the degrees as you play, so you can recognize the sound in another key rather than remembering only a shape.
Understand the sound
Bm7♭5: from a pattern to a musical choice
What gives Bm7♭5 its identity?
Compare the flat fifth with a perfect fifth while keeping the other notes fixed. That one change turns a minor seventh into a half-diminished chord.
Here the third is D, and degree ♭7 is A. Play B in the bass and compare these voices individually before combining them.
Turn the arpeggio into a melody
Try D – F – A – B as quarter notes, then repeat the first note and omit the last. The second phrase uses the same harmony with a different shape.
Sound the strings separately before playing them together. If a note is muted, adjust the finger angle instead of squeezing harder.
Your guitar checkpoint
Start with B on string 6, fret 7. The next note D is on string 6, fret 10. Name both notes aloud before playing, then find the same two pitches in another octave.
Before moving on, close the diagram and name the notes: B · D · F · A. Then play a two-bar phrase from memory and leave two bars of silence.
On piano
Bm7♭5 on the keyboard.
Reference
Bm7♭5 — chord tones & intervals.
| Chord tone | Note | Interval from B |
|---|---|---|
| 1 | B | unison (0 semitones) |
| ♭3 | D | minor 3rd (3 semitones) |
| ♭5 | F | diminished 5th (6 semitones) |
| ♭7 | A | minor 7th (10 semitones) |
Goes with: B Locrian (B C D E F G A). Voicings: Bm7♭5 voicings on guitar.
Take it to the bandstand.Practice Radio streams endless changes to play the Bm7♭5 arpeggio over through all twelve keys, with the chord and scale shown live — plus ear-training and call & response modes.
▶ Open Practice RadioCommon questions
Bm7♭5 arpeggio FAQ.
What notes are in a Bm7♭5 arpeggio?
B – D – F – A. As chord tones: 1 ♭3 ♭5 ♭7. Played one after another instead of together, that is the arpeggio.
What is a Bm7♭5 chord used for?
Bm7♭5 is the iiø chord of a minor ii–V–i. Its character is dark, unstable, leading.
Which scale goes with Bm7♭5?
B Locrian (B C D E F G A) — the arpeggio is the skeleton of that scale, so practise them together.
How do I practise the Bm7♭5 arpeggio on guitar?
Start on the root B on the low E string at fret 7 and play E-string fret 7, E-string fret 10, A-string fret 8, D-string fret 7, D-string fret 9. Then play it descending, then in eighth notes with a metronome, then use it in a short phrase over a suitable chord.
Keep going
Half-diminished (m7♭5) arpeggio in every other key.
Same arpeggio on piano · Half-diminished (m7♭5) hub · chord-scale theory.
Other arpeggios from B