A# 13b9 — Complete Guitar Arpeggio Guide Overview A# 13b9 is a ninth arpeggio containing 6 notes: A#, D, F, Ab, B, G. The formula 1-3-5-b7-b9-13 defines its interval structure. Altered dominant — 13th with flatted 9th. This arpeggio belongs to the complex, altered dominant family and is commonly used in Jazz, Bebop music. Music Theory The A# 13b9 arpeggio uses the intervals Root (1), Major Third (3), Perfect Fifth (5), Minor Seventh (b7), Minor Ninth (b9), Major Thirteenth (13). Starting from A#, each note is a specific interval above the previous degree. The A# 13b9 arpeggio is constructed using the interval formula 1-3-5-b7-b9-13, which means it contains the intervals Root (1), Major Third (3), Perfect Fifth (5), Minor Seventh (b7), Minor Ninth (b9), Major Thirteenth (13) above the root A#. The notes are A#, D, F, Ab, B, G. An arpeggio differs from a scale in that it uses only the chord tones — the notes of the underlying chord played sequentially rather than simultaneously. The altered arpeggio contains modified chord tones for maximum tension. Key characteristics: Jazz, Bebop. Sound & Character A# 13b9 sounds complex, dissonant, and highly tense. The altered intervals create maximum harmonic tension that demands resolution. The emotional feeling is intense, unpredictable, and sophisticated. Used in bebop and modern jazz for extended harmonic passages. Musical Applications A# 13b9 is most commonly found in Jazz, Bebop music. This advanced arpeggio opens up sophisticated harmonic possibilities. Common uses include outlining V13b9 and creating melodic lines. Practice Recommendations Start with 5-minute sessions playing each note slowly and cleanly. Gradually increase to 10-minute metronome exercises, then 20-minute improvisation sessions. At 30 minutes, explore multiple fretboard positions and connect them smoothly. Record your practice to identify areas for improvement.