Acoustic interference rate determines the pulsation category of every di-chord
Dissonant — 8Hz
Fast interference — you feel the clash
Waveform — ~8 beats/sec
"Like two voices fighting. The acoustic interference beats 8 times per second — fast enough to feel as buzz or roughness."
[1]
Maximum tension
Buzzes, clashes, urgent
[2]
Strong tension
Pushes hard to resolve
[10]
Moderate tension
Restless, wants movement
[11]
Extreme tension
Almost painful dissonance
Modal — 4Hz
Gentle wave — quality di-chords
Waveform — ~4 beats/sec
"A gentle oscillation. Slow enough to feel as warmth (dark) or brightness (light) rather than tension."
[3]
Gentle wave — warm minor quality
Dark, intimate color
★ Sprint 1 entry point
[4]
Gentle wave — bright major quality
Open, lifted color
★ Sprint 1 entry point
[8]
Gentle wave — dark, heavy minor color
Dense, weighted quality
[9]
Gentle wave — open, lifting major color
Airy, expansive quality
Perfect — 2Hz
Nearly still — stability and openness
Waveform — ~2 beats/sec
"So slow the wave nearly disappears. What you feel is spaciousness and stability rather than oscillation."
[5]
Nearly still
Open, hollow stability
[6]
Frozen
Neither stable nor tense; splits the octave
[7]
Nearly still
Full, resonant stability
Why This Matters
Pulsation is the first thing you hear.
Before you hear quality (major/minor) or direction, you hear whether an interval is
buzzing, waving, or floating.