Additive Synthesis

Additive synthesis is the conceptual opposite of subtractive synthesis. Instead of filtering harmonics away from a rich waveform, you build a sound up from scratch by stacking individual sine waves, each representing a single harmonic with its own amplitude and envelope. Because any periodic sound can in theory be described as a sum of sines, additive synthesis offers extraordinarily precise control over timbre, letting you sculpt each harmonic independently and animate them over time for evolving, shimmering tones. The trade-off is complexity: a realistic sound may require dozens of partials, which historically made additive synths tedious to program and heavy to run. Modern additive and spectral tools ease this with visual editors and resynthesis, letting you analyze a sample and reconstruct it from its partials.