Harmonic Tension Threshold (HTT) – In SVP, the HTT is the critical vibratory condition at which converging syntropic (restorative) forces build to their maximum harmonic density just prior to scalar destabilization and entropic discharge. It marks the final usable moment of organized scalar tension—before disintegration, explosion, or collapse. This threshold is defined not by force or pressure, but by musical interval structure, representing the point where power amplitude of sympathetic resonance becomes unsustainable unless relieved.
Clarifying Note (SVP + Keely + Musical Theory):
The HTT is reached when syntropic streams align into high-order harmonic compression, often resonating in musical intervals of thirds, sixths, and ninths (Keely’s preferred resonating structures).
As they approach the center, these harmonics generate increasing coherent density—but only up to a point. Once beyond harmonic containment, the energy turns unstable.
The HTT is frequently associated with the dominant seventh interval or its enharmonic equivalents—musical structures rich in dissonance, demanding resolution or release.
Beyond this intervalic state lies the tritone or "Devil’s Interval" (augmented 4th/diminished 5th)—traditionally symbolic of collapse or rupture in both music and energy dynamics.
Energetic Significance:
If tapped harmonically at the HTT, energy can be siphoned safely and efficiently.
If ignored or exceeded, the system may undergo disintegration, as Keely frequently experienced in his early experiments.
The HTT is therefore a vibratory gateway: either leading to creative output (usable force) or catastrophic release (collapse into entropy).
Musical Summary:
| Interval | SVP Meaning |
| 3rd/6th/9th | Stable syntropic harmonic buildup |
| 7th | Tension peak—final usable compression |
| Tritone | Collapse point—beyond which disintegration occurs |
In Other Words:
HTT is the poised dissonance just before the fall, the high harmonic edge of the scalar field.
It is the last breath before a spark, the final harmonic moment where sympathetic extraction is still possible.
It’s not about pressure—it’s about intervalic dissonance approaching structural failure.