Cathenge is now completed and on display at Patricia’s Green in Hayes Valley, San Francisco. The culmination of over a year’s continuous work by artist David Normal, and intensive collaboration and coordination with a talented team of builders and technicians has brought Cathenge to life. Below are some photos of the newly erected installation.
Below is an 3D visualization of the Cathenge Installation for Patricia’s Green. ADA (American Disabilities Act) regulations required that the tips of the star shaped pedestal upon which the cats are standing be truncated. Not only did this provide a more equitable and accessible experience, but it also improved the design.
Below are some of the plans and drawings used in proposing and designing Cathenge. Basically, these are the design strategies in place that have been refined by RBHU Engineering (Structural Engineers).
This was the initial 3D printed scale model of Cathenge. Printed by Christopher Christensen. This photo shows the model on display at Burning Man Decompression SF in the fall of 2018. My painting, “Succubus”, can be seen in the background.
The effect I’d like to achieve with the Catoliths is similar to a set of windchines. Motion detection creates the chiming of the Catoliths. Each cat has an infrared sensor mounted in its chin and facing downward. This creates a cone of interactivity wherein a visitor to Cathenge will hear the cats “intone” their respective notes. Additionally, triggering one cat will trigger notes in the other cats (ideally, this is a random or semi-random pattern).
Thanata = 396hz = DO = Tonic C = Saturn
Fortuna = 417hz = RE = D = Jupiter
Lyrata = 528hz = MI = E = Mars
Erotica = 639hz = FA = F = Earth
Lunata = 741 = SO = G = Venus
Solara = 852 = TI = A = Mercury
The above equivalencies connect each catolith to a specific solfeggio frequency. Above (396 – 852) is the solfeggio scale used in Gregorian chanting.
Because planets with larger eccentricities have a greater variation in speed they produce more “notes.” Earth’s maximum and minimum speeds, for example, are in a ratio of roughly 16 to 15, or that of a semitone, whereas Venus’ orbit is nearly circular, and therefore only produces a singular note. Mercury, which has the largest eccentricity, has the largest interval, a minor tenth, or a ratio of 12 to 5. This range, as well as the relative speeds between the planets, led Kepler to conclude that the Solar System was composed of two basses (Saturn and Jupiter), a tenor (Mars), two altos (Venus and Earth), and a soprano (Mercury), which had sung in “perfect concord,” at the beginning of time, and could potentially arrange themselves to do so again.
Musica universalis (literally universal music), also called Music of the spheres or Harmony of the Spheres, is an ancient philosophical concept that regards proportions in the movements of celestial bodies—the Sun, Moon, and planets—as a form of musica (the Medieval Latin term for music). This “music” is not usually thought to be literally audible, but a harmonic, mathematical or religious concept.
The idea continued to appeal to thinkers about music until the end of the Renaissance, influencing scholars of many kinds, including humanists. Further scientific exploration has determined specific proportions in some orbital motion, described as orbital resonance. – Ref: Wikipedia
Sit, Jessica. Look how the floor of heaven Is thick inlaid with patines of bright gold: There’s not the smallest orb which thou behold’st But in his motion like an angel sings, Still quiring to the young-eyed cherubins; Such harmony is in immortal souls; But whilst this muddy vesture of decay Doth grossly close it in, we cannot hear it.