Octave doubling enriches chords by repeating root and fifth across registers; open vs. closed spacing changes density

A triad has only 3 distinct pitches, but in arrangements with many voices (or layered synths), notes must be doubled at octaves. Root and fifth are the best candidates for doubling (they give strength and backbone); the third adds richness (called the sweet note) but doubling it too heavily risks muddiness. Closed spacing packs chord tones as close together as possible; open spacing spreads them over a wider register. Both approaches serve different textures: closed spacing = tight, punchy; open spacing = wide, spacious.

Examples

A minor with octave doubling: A2 C3 E3 A3 E4 A4 (root doubled twice, fifth doubled once, third once). Closed C major: C4 E4 G4. Open C major: C3 G3 E4 C5.

Assessment

Write an A minor chord with the root doubled three times and the fifth doubled twice across 5 octaves. Describe the sonic difference from closed position.