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Block Chords

Block chords — sometimes called the Shearing technique after pianist George Shearing — harmonize the melody in solid four-part chords, with all the voices moving in parallel. The result is a lush, “locked-hands” sound that was the signature texture of bebop-era big-band pianists.

The shape

How it works

Take a melody note and harmonize it with a four-part chord. Play the melody note as the top of the chord in the right hand, then double it an octave below with the left hand, so the melody rings out on the top and the bottom simultaneously. The remaining inner voices fill out the chord in the space between them. As the melody moves, all four (really five, counting the doubled octave) voices shift in parallel beneath it — the hands stay “locked” together.

In context

When to use it

Block chords shine on slower melodic passages and ballads, where you want maximum richness behind a singing melody. They suit standards like “Misty” or “Over the Rainbow” well. They're too thick for fast bebop lines, though — save the technique for phrases where the melody has room to breathe, and switch to lighter textures when the line gets busy.

At the keyboard

Piano technique

The hard part is moving four voices smoothly in parallel without voice-leading mistakes. Practice the inner voices on their own first, then add the doubled melody octave on top and bottom. Keep the inner voices stepping by the smallest interval possible from chord to chord — avoid large jumps in the middle of the texture, which break the locked-hands illusion. Smooth voice leading is what makes block chords sound like one moving wall of sound rather than a series of separate grabs.