DX7 algorithm 32 enables additive synthesis by running all six operators as independent carriers

The DX7 uses algorithms that define how its six operators connect — as carriers (producing audio output) or modulators (modifying carriers). Algorithm 32 places all six operators in parallel as independent carriers with no modulation routing. This allows each operator to produce a separate sine wave at its assigned frequency ratio, and the voice becomes a six-partial additive synthesizer. Setting frequency ratios to ascending integers (1, 2, 3, 4, 5, 6) produces the first six harmonics of a tone. Individual operator output levels control partial amplitudes. This gives direct manual control over harmonic content — the opposite of FM’s parameter-space indirection — but is limited to six partials maximum.

Examples

Addsynth 1: all six operators at frequency ratios 1-6 with output 99. The result sounds like a basic organ. Muting individual operators removes specific harmonics and changes the tone colour.

Assessment

Given DX7 Algorithm 32 with all operators at frequency ratios 1, 2, 3, 4, 5, 6 and equal output levels, name the synthesis technique being used and predict the effect of reducing Op. 4 (ratio 4) to output level 0.