A# Suspended 4th (A#sus4) — Complete Guitar Chord Guide Overview A# Suspended 4th is a suspended chord built on the root A#. The notes are A#, D#, F, following the formula 1 - 4 - 5. This chord is essential for guitarists exploring Rock, Pop music and appears in countless songs across multiple genres. The Suspended 4th quality gives it a distinctive harmonic character that offers openness and ambiguity. Music Theory The A# Suspended 4th chord uses the interval formula 1 - 4 - 5, producing the Root (1), Perfect Fourth (4), Perfect Fifth (5). The notes A#, D#, F define its unique sonic footprint. Constructing this chord begins with the A# major scale (A# C D D# F G A). Replacing the third with the 2nd or 4th removes the major/minor distinction. Playing Tips For beginner level players, A#sus4 requires basic finger positioning and open string awareness. Focus on clean articulation of each note and smooth transitions to related chords. Musical Applications A# Suspended 4th is most commonly found in Rock, Pop, Classical music. Typical uses include adding sophisticated harmonic color in jazz, fusion, and contemporary contexts. Common chord progressions include A#sus4 - A# and A# - D#sus4 - A# - Fsus4. 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.