A# Major 7th Flat 5 (A#maj7b5) — Complete Guitar Chord Guide Overview A# Major 7th Flat 5 is a major chord built on the root A#. The notes are A#, D, E, A, following the formula 1 - 3 - b5 - 7. This chord is essential for guitarists exploring Modern Jazz, Fusion music and appears in countless songs across multiple genres. The Major 7th Flat 5 quality gives it a distinctive harmonic character that provides brightness and stability. Music Theory The A# Major 7th Flat 5 chord uses the interval formula 1 - 3 - b5 - 7, producing the Root (1), Major Third (3), Tritone (b5/#4), Major Seventh (7). The notes A#, D, E, A define its unique sonic footprint. Constructing this chord begins with the A# major scale (A# C D D# F G A). Taking the 1st, 3rd, and 5th degrees gives the stable major triad. Playing Tips For advanced level players, A#maj7b5 requires advanced finger positioning and voice-leading awareness. Explore inversions, extensions, and substitutions to fully exploit the chords harmonic potential. Musical Applications A# Major 7th Flat 5 is most commonly found in Modern Jazz, Fusion music. Typical uses include establishing key centers, providing harmonic stability, and serving as the point of resolution in progressions. Common chord progressions include . Practice Recommendations Start with 5-minute sessions focusing on clean articulation of each note. Gradually increase to 10-minute transition drills with a metronome, then 20-minute arpeggio and rhythm variation practice. At 30 minutes, apply the chord to full progressions at increasing tempos. Record your practice to identify areas for improvement.