Describe how a composer might use quartal harmony to create a unique and modern sound within a jazz context.

Quartal harmony, which is based on intervals of fourths instead of the more traditional thirds, offers a unique and modern sound within a jazz context. Unlike tertian harmony, which is derived from stacks of thirds (as in the traditional major and minor chords), quartal harmony uses stacks of fourths, creating a more open, ambiguous, and often dissonant sound. The use of quartal harmony allows composers to move away from the familiar and predictable sounds of traditional jazz harmony. It offers a way to create fresh sonic landscapes and expand harmonic possibilities. One of the key ways composers utilize quartal harmony is by creating chords built from stacked fourths. For example, instead of a typical C major chord (C-E-G), a quartal voicing might be C-F-Bb. This simple example demonstrates how different quartal harmony sounds compared to tertian. Using these voicings can create chords that lack a clear sense of major or minor, creating a more ambiguous harmonic environment. These open-sounding voicings often feel less resolved than traditional chords and have a more modern and spacious feel. The use of quartal voicings also provides more flexibility in how chords are voiced, allowing composers to create interesting sounds. Another approach is the use of quartal harmony in melodic lines. Composers can create melodies using fourth intervals to give a unique contour and feel. This contrasts with traditional jazz melodies that often rely on scale-based patterns and arpeggios. Quartal melodies are often more angular and unpredictable, and lack a sense of a traditional melodic structure. The use of this give....