Hallelujah Junction: II. Movement II

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Musical Terms (3)

• hocketing Medieval Latin
  A technique in which a melody or melodic fragment is split between two voices that alternate rapidly, each filling in the other's rests. Originally a medieval polyphonic device, it re-emerged in the 20th century in African-influenced minimal music (Steve Reich's Drumming) and in Adams's piano works. In American Berserk and Hallelujah Junction, the two hands or two pianos hocket short figures back and forth at speed, creating a single fast melodic line from two interleaved streams.
  Hocketing passages require precise rhythmic independence between the hands or players. Each voice must be confident in its own rhythm — hesitation in one creates a gap the other cannot fill. At tempo, hocketed lines sound merged into one; below tempo, the seam between voices is exposed.
• interlocking patterns English
  A compositional device in which two or more voices share the same rhythmic material but are displaced against each other — each voice fills the rhythmic spaces left by the other, creating a dense, seamless texture from simple cells. Related to African percussion ensemble technique, West African kora duet practice, and Steve Reich's interlocking keyboard patterns. Central to Hallelujah Junction, where the two pianos constantly complete each other's phrases in tightly locked rhythmic grids.
  Interlocking works only when both players are absolutely steady. The natural tendency is to listen to your partner and adjust — resist this. Each player must be self-sufficient in their own part; the interlocking then happens automatically. Think of it as two clocks running simultaneously rather than two musicians accompanying each other.
• phasing English
  A minimalist technique in which two or more voices play the same or similar material at a slight temporal offset, creating interference patterns, echo effects, and rhythmic complexity from simple source material. Steve Reich's 1967 Piano Phase is the canonical solo piano example. Adams uses phasing in Hallelujah Junction — the two pianos play nearly identical figures with slight delays between them, as if one piano is processing the other through a delay circuit.
  In phased passages, resist the instinct to align with your duo partner — the slight displacement is the intended sound. Maintain your own steady pulse without listening for a unison that will never arrive. The listener's perception of pulse will fluctuate between the two players' rhythms, creating a shimmer the two pianos cannot produce alone.