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Harmonic

About this chapter

This chapter covers the harmonic chart. Harmonic charts transform the natal chart by a harmonic number you specify. You can pick a preset (1 to 12), enter a custom value, or use the age harmonic, which calculates from the subject's age.

The screen is split in two, with the harmonic wheel on the left and the right panel (Planets, Houses, Aspects, Midpoints) on the right, so you can check midpoints (half sums) on the same screen. Harmonic charts are available on the Pro plan and above.

Creating a harmonic chart

The harmonic input fields (presets 1-12, custom entry, and age harmonic)

Steps

  1. Open Harmonic from the menu and choose the birth data in the header.
  2. To correct data on the spot, edit it with the pencil (edit) and apply it with Recalculate.
  3. Choose the harmonic number you want from the preset (1-12) buttons at the top. Pressing a button calculates and displays it on the spot.
  4. For a number not among the presets, type a value into the field on the right and press OK (the Enter key works as well). Decimals such as 4.5 are accepted.
  5. When birth data is selected, the Show Chart button recalculates at the current harmonic number.

Notes

  • The title above the chart shows the current harmonic number in the form Harmonic H(n).
  • If you open the page without selecting birth data, the preset, custom entry, and age harmonic controls are not shown. They appear once you select birth data.
  • Custom entry accepts values of 0.01 and above. Non-numeric values and values of 0 or below are ignored.
  • Changing the zodiac recalculates automatically at the same harmonic number.

Age harmonic

A harmonic number produced by the age harmonic (46.15, for example)

Steps

  1. Choose the birth data in the header (the button only appears when birth data is selected).
  2. Press the Age Harmonic button.
  3. The current age in completed years, derived from the date of birth and given to two decimal places, is used directly as the harmonic number.

Notes

  • The calculated age is also placed in the custom entry field, so you can fine-tune it from there and recalculate.

Choosing the zodiac

The zodiac selector (Tropical / Sidereal (Lahiri))

Steps

  1. Choose Tropical or Sidereal (Lahiri) from the Zodiac selector.
  2. Changing it recalculates automatically at the same harmonic number.

Notes

  • The houses of a harmonic chart are always calculated as equal houses (30 degrees at a time from the ASC after the harmonic transformation), so unlike the other charts there is no house system selector.
  • The MC is shown at its position after the harmonic transformation and is not tied to the house cusps (a floating MC).

Reading the right panel

The right panel (the Aspects tab, for example; the Planets / Houses / Aspects / Midpoints tabs switch the data)

Notes

  • There are four tabs: Planets / Houses / Aspects / Midpoints.
  • Planets tab: lists the planets after the harmonic transformation (planet, sign, degree, and so on).
  • Houses tab: lists the houses and the planets in each one.
  • Aspects tab: shows the list and grid of aspects within the harmonic chart. Aspect patterns are shown as well when there are any.
  • Midpoints tab: shows the midpoints (half sums).
  • Until a chart has been calculated, each tab shows "No data".

Midpoints (half sums)

The Midpoints tab (harmonic H4, All Axes, in three columns for cardinal, fixed, and mutable)

Steps

  1. Open the Midpoints tab in the right panel.
  2. Switch the Harmonic and the Display Mode (All Axes / Stimulation) to choose what you want to see.
  3. The print button inside the tab prints the midpoints in landscape.

Notes

  • The harmonic used for the midpoints is set independently of the harmonic number of the wheel itself.
  • For the basics of midpoints, see also Half sums on the ARI official site (in Japanese).

Display and printing

Steps

  1. The Print button prints the harmonic wheel and the data in portrait. The file name includes "Harmonic" and the harmonic number (H(n)).
  2. Clicking the wheel enlarges it, and from the enlarged view you can save the image with PNG.
  3. The Display Settings button lets you adjust the planets and aspects shown on the spot.

Notes

  • The print button only appears once a chart has been calculated.
  • If you print while you have edited the birth data and recalculated, a note saying the data is being edited is added to the print header.

Plans

Harmonic charts require Pro and above (a lock icon on the menu means your plan cannot open it). Once you can open the page, all of the features inside it — midpoints, display settings, and the rest — are available.