What is block chords?

Block chords are a harmonic accompaniment technique commonly used in jazz music. They involve playing a chord in which all the notes are played simultaneously, creating a dense and full sound. Block chords are typically played by pianists, guitarists, and other instrumentalists to provide a strong foundation for melody lines or improvisation.

One of the most common ways block chords are played is by stacking the chord tones in a closed voicing, meaning the notes are played in a compact arrangement without skipping any notes in the chord. This creates a rich and harmonically dense sound that can be used to support a soloist or vocalist.

Block chords can also be played in an open voicing, where the notes are spread out over multiple octaves, creating a more spacious and open sound. This technique is often used to create tension or resolution in a musical passage.

Overall, block chords are a versatile and effective way to accompany a soloist or create a lush harmonic texture in jazz and other styles of music.