The six aspects, as intervals.
An aspect is a ratio between two angular positions; a musical interval is a ratio between two frequencies. The instrument uses the one as the other — directly, with no intermediate step — and the table below is the whole mapping.
Stereo headphones for the beat.
| Aspect | Angle | Interval | Ratio | Carrier |
|---|---|---|---|---|
| Semi-Sextile | 30° | minor third | 1.2:1 | 140.5 Hz |
| Sextile | 60° | perfect fifth | 1.5:1 | 147.9 Hz |
| Square | 90° | perfect fourth | 1.33:1 | 213.2 Hz |
| Trine | 120° | perfect fifth | 1.5:1 | 147.6 Hz |
| Quincunx | 150° | major sixth | 1.6:1 | 131.9 Hz |
| Opposition | 180° | octave | 2:1 | 116.0 Hz |
The sextile and the trine share the perfect fifth: 60° and 120° both reduce to the same 1.5 ratio, which is why they sound alike and behave alike. The opposition is the octave — the same note an octave apart, two bodies at 180°, maximally separated and maximally consonant. The square is the perfect fourth, the quincunx a major sixth, the semi-sextile a minor third.
The carrier column is the frequency each interval is currently sounding at, which moves because it is derived from the two bodies actually holding the angle. The interval and the ratio never move; they are properties of the angle.
A note on what this is not. Horoscorpio makes no therapeutic claim. The sound is a faithful rendering of a measurement, and people use it for rest and for focus, but nothing here treats anything. The rest page is honest about the same limit.
Every planet's own frequency
Before an aspect applies its ratio, each body carries a base frequency of its own. Hear all eleven.
Frequencies are the instrument's own and are checkable by pressing play. Times and measurements are UTC.