Map it slowly
Find F♯ on string 6 at fret 2. Play string 6, fret 2; string 6, fret 5; string 5, fret 3; string 4, fret 2; string 4, fret 4. Use a relaxed position and release pressure between repetitions. String 1 is high E.
Arpeggio · F♯m7♭5 · Guitar
F♯m7♭5 arpeggio on guitar
The F♯m7♭5 arpeggio is F♯ – A – C – E — chord tones 1 ♭3 ♭5 ♭7. F♯m7♭5 is the iiø chord of a minor ii–V–i; its sound is dark, unstable, leading. Below, every F♯, A, C, E on the fretboard is marked, with the root in gold. Press play to hear a one-octave arpeggio, or tap any note.
Visualizer
F♯m7♭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 2. 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 F♯ Half-diminished (m7♭5) part of your playing
Make a short phrase
Play F♯ – A – C – E in quarter notes at 60 bpm. Repeat starting from A, wrapping back to F♯. Do not speed up until every attack is even.
Hear it in context
Alternate A and E above a sustained F♯. These are degree ♭3 and ♭7. End a four-bar phrase on either one instead of always returning to the root.
Listen for this: F♯m7♭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
F♯m7♭5: from a pattern to a musical choice
What gives F♯m7♭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 A, and degree ♭7 is E. Play F♯ in the bass and compare these voices individually before combining them.
Turn the arpeggio into a melody
Try A – C – E – F♯ 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 F♯ on string 6, fret 2. The next note A is on string 6, fret 5. 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: F♯ · A · C · E. Then play a two-bar phrase from memory and leave two bars of silence.
On piano
F♯m7♭5 on the keyboard.
Reference
F♯m7♭5 — chord tones & intervals.
| Chord tone | Note | Interval from F♯ |
|---|---|---|
| 1 | F♯ | unison (0 semitones) |
| ♭3 | A | minor 3rd (3 semitones) |
| ♭5 | C | diminished 5th (6 semitones) |
| ♭7 | E | minor 7th (10 semitones) |
Goes with: F♯ Locrian (F♯ G A B C D E). Voicings: F♯m7♭5 voicings on guitar.
Take it to the bandstand.Practice Radio streams endless changes to play the F♯m7♭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
F♯m7♭5 arpeggio FAQ.
What notes are in a F♯m7♭5 arpeggio?
F♯ – A – C – E. As chord tones: 1 ♭3 ♭5 ♭7. Played one after another instead of together, that is the arpeggio.
What is a F♯m7♭5 chord used for?
F♯m7♭5 is the iiø chord of a minor ii–V–i. Its character is dark, unstable, leading.
Which scale goes with F♯m7♭5?
F♯ Locrian (F♯ G A B C D E) — the arpeggio is the skeleton of that scale, so practise them together.
How do I practise the F♯m7♭5 arpeggio on guitar?
Start on the root F♯ on the low E string at fret 2 and play E-string fret 2, E-string fret 5, A-string fret 3, D-string fret 2, D-string fret 4. 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 F♯