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@@ -371,11 +371,10 @@ </p> <p> - I later learned that I had rediscovered the - <a href="https://www.lambdoma.com/">Lambdoma</a>, so called by the - ancient Greeks for its resemblance to the letter Lambda. The synergy - of color and sound in the Lambdoma, linking the octave to the color - wheel, was first studied in depth by artist and sound practitioner + I later learned that I had rediscovered the Lambdoma, named for its + resemblance to the Greek letter Lambda. The synergy of color and sound + in the Lambdoma, linking the octave to the color wheel, was first + studied in depth by artist and sound practitioner <a href="https://www.lambdoma.com/barbara-hero.html">Barbara Hero</a>. Hero made the Lambdoma her life's work, and built an 8x8 electronic Lambdoma instrument for sound healing purposes. @@ -414,14 +413,27 @@ <p> With the root, fifth, and fourth in the top-left corner, the Lambdoma - shows how the 3:2 proportion is essential to the perception of - consonance. The musical circle of fifths, derived from these simple - proportions, can be studied in more detail in this program's - Pythagorean scale mode. Similar notes can be found by color and - compared. One can easily hear how stacked fifths overshoot the octave - by finding two far-apart red notes and playing both at once, which - makes them beat against each other. This interval is the "syntonic - comma" which is averaged out in various keyboard tuning systems. + shows how the 3:2 proportion is essential to human perception. + </p> + + <p> + Mapping colors logarithmically to this wheel of fractions, with red at + the octave (1:1), it naturally follows that the fourth (4:3) is green, + and the fifth (3:2) is blue. These ratios seem to correspond to the + photoreceptors in the human retina, which are sensitive to wavelengths + of light in three different ranges: long, medium, and short. These + ranges are perceived as "red, green, and blue" in the brain; our + mind's eye sees a continuous cycle of color that loops back on itself. + </p> + + <p> + The musical circle of fifths, derived from these simple proportions, + can be studied in more detail in this program's Pythagorean scale + mode. Similar notes can be found by color and compared. One can easily + hear how stacked fifths overshoot the octave by finding two far-apart + red notes and playing both at once, which makes them beat against each + other. This interval is the "syntonic comma" which is averaged out in + various keyboard tuning systems. </p> <p> |