Build the sound
Play A♯ – C♯ – E – G♯ individually, then choose a shell voicing above. Sing the highest note before playing the chord.
Voicings · A♯m7♭5 · Guitar
A♯m7♭5 voicings on guitar
A♯m7♭5 is spelled A♯ – C♯ – E – G♯ (1 ♭3 ♭5 ♭7) — the iiø chord of a minor ii–V–i. Here are 5 ways to voice it on guitar: drop 2, drop 3, shell, rootless a, rootless b. Every diagram is playable — press play to hear the chord, or “roll it” to hear the voices one by one, low to high.
The voicings
5 ways to play A♯m7♭5.
SoundRoot in gold, other voices in teal. Tap any note.
Drop 2
E · A♯ · C♯ · G♯Take the close voicing and drop its second-highest voice an octave. The most-used four-note voicing on guitar and in piano left hands. Strings D-G-B-e, frets 2-3-2-4.
Drop 3
C♯ · A♯ · E · G♯Drop the third-highest voice of the close voicing an octave: a wide, open sound. Strings A-G-B-e, frets 4-3-5-4 (position 1).
Shell (1–7–3)
A♯ · G♯ · C♯Root, seventh and third only. The fifth is dropped — it adds nothing to the chord's identity — leaving a light, clear voicing. Strings A-G-B, frets 1-1-2.
Rootless A (3–5–7–9)
C♯ · E · G♯ · B♯Bill Evans-style left-hand voicing: the third on the bottom, the ninth on top, the bass player supplies the root. Strings A-D-G-B, frets 4-2-1-1.
Rootless B (7–9–3–5)
G♯ · B♯ · C♯ · EThe companion rootless voicing with the seventh on the bottom. Alternate A and B so the top voice moves by step through a ii–V–I. Strings E-A-G-B, frets 4-3-6-5 (position 2).
Your next 10 minutes
Make A♯ Half-diminished (m7♭5) part of your playing
Change the top note
Compare the displayed voicings of A♯m7♭5. Notice which note is highest in each. Repeat the two shapes with the smallest comfortable hand movement, leaving a beat of silence between them.
Comp with space
Play A♯m7♭5 on beats 2 and 4 at 60 bpm for four bars, then on the “and” of beat 2 for four bars. Keep the same notes while changing the rhythm. Mute unused strings and test each fretted note for buzz.
Listen for this: The chord tones are A♯, C♯, E, G♯. the iiø chord of a minor ii–V–i. A fuller voicing is not automatically better: leave room for the melody and bass.
Understand the sound
A♯m7♭5: from a pattern to a musical choice
What gives A♯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 C♯, and degree ♭7 is G♯. Play A♯ in the bass and compare these voices individually before combining them.
Choose a useful voicing
Start with the smallest displayed shape you can play cleanly. Move its highest note into a comfortable register and listen for a clear melody above the chord.
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 A♯ on string 6, fret 6. The next note C♯ is on string 6, fret 9. 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: A♯ · C♯ · E · G♯. Then play a two-bar phrase from memory and leave two bars of silence.
Behind the voicings
Every A♯m7♭5 chord tone on the fretboard.
Reference
A♯m7♭5 — chord tones & function.
| Chord tone | Note | Interval |
|---|---|---|
| 1 | A♯ | unison |
| ♭3 | C♯ | minor 3rd |
| ♭5 | E | diminished 5th |
| ♭7 | G♯ | minor 7th |
Arpeggio: A♯m7♭5 arpeggio on guitar. Scale: A♯ Locrian.
Take it to the bandstand.Practice Radio streams endless changes to comp A♯m7♭5 through all twelve keys, with the chord and scale shown live — plus ear-training and call & response modes.
▶ Open Practice RadioCommon questions
A♯m7♭5 voicings FAQ.
What notes are in A♯m7♭5?
A♯, C♯, E, G♯ — chord tones 1 ♭3 ♭5 ♭7. Rootless voicings add the 9th, B♯, and leave the root to the bass.
What is the easiest A♯m7♭5 voicing on guitar?
The shell voicing (root, seventh, third) on strings A, G, B: three notes, one comfortable shape, and it still sounds unmistakably like A♯m7♭5.
What is a drop-2 voicing?
Start from the close voicing A♯ C♯ E G♯ and drop the second note from the top an octave: E – A♯ – C♯ – G♯. It spreads the chord so it fits the hand — and on guitar it fits four adjacent strings.
Where does A♯m7♭5 appear?
A♯m7♭5 is the iiø chord of a minor ii–V–i. Its character is dark, unstable, leading.
Keep going
Half-diminished (m7♭5) voicings in every other key.
Same chord on piano · Half-diminished (m7♭5) hub.
Other chords from A♯