5 ms·

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keymasta 2y ago
I really like the link you provided and have watched it before! But - I do want to say that C == green is not arbitrary at all. It is consistent with my calculations, which are consistent with Newton's calculations. Usually I see the colours being assigned to notes as wrong.. but this C == green is consistent with mapping light, using octave equivalence, given by the following: f_prime = f * 2 ** (i / 12) # Where, # f' is the derived f, (in this case Green {5.66 × 10^14 Hz}) # f is the reference f (in this case 261.63 Hz) # i is the interval in semitones Let's say that C == 261.63 Hz, and that Green == 5.66 × 10^14 Hz. Using the preceding formula we can make a small (python) program to check whether C == Green. light_range_min = 400 * 10 ** 9 # Hz light_range_max = 790 * 10 ** 9 # Hz C = 261.63 # Hz octave = 0 for octave in range(100): # we are just using a high number here f_prime = C * 2 ** (12 * octave / 12) if f_prime >= light_range_min: octave = octave break print(f"C in the range of light has f == {f_prime}, which is {f_prime / 10 ** 9} THz. We had to go {octave} octaves up to arrive there") # outputs: C in the range of light has f == 561846146826.24, which is 561.84614682624 THz. We had to go 31 octaves up to arrive there We can look up colour charts like [0] or [1] and find that this frequency is in fact associated with the colour green. The rest of your commentary seems valid. [0] https://en.wikipedia.org/wiki/Visible_spectrum https://en.wikipedia.org/wiki/Visible_spectrum [1] https://sciencestruck.com/color-spectrum-chart https://sciencestruck.com/color-spectrum-chart
- acjohnson55 2y ago
  Perceptually, the C pitch class and the color green have nothing to do with each other.
- davay 2y ago
  Exactly! It's all made visual and interactive here https://chromatone.center/theory/interplay/spectrum/ https://chromatone.center/theory/interplay/spectrum/ - you can even slide the tuning of A4 by dragging left-to-right the last graph - it will show the distribution on 44th octave notes along the visual spectrum
- keymasta 2y ago
  Not sure why I got down voted but the parent has deleted their post so ok! :D
deleted 2y ago
[deleted]

I really like the link you provided and have watched it before! But - I do want to say that C == green is not arbitrary at all. It is consistent with my calculations, which are consistent with Newton's calculations. Usually I see the colours being assigned to notes as wrong.. but this C == green is consistent with mapping light, using octave equivalence, given by the following: f_prime = f * 2 ** (i / 12) # Where, # f' is the derived f, (in this case Green {5.66 × 10^14 Hz}) # f is the reference f (in this case 261.63 Hz) # i is the interval in semitones Let's say that C == 261.63 Hz, and that Green == 5.66 × 10^14 Hz. Using the preceding formula we can make a small (python) program to check whether C == Green. light_range_min = 400 * 10 ** 9 # Hz light_range_max = 790 * 10 ** 9 # Hz C = 261.63 # Hz octave = 0 for octave in range(100): # we are just using a high number here f_prime = C * 2 ** (12 * octave / 12) if f_prime >= light_range_min: octave = octave break print(f"C in the range of light has f == {f_prime}, which is {f_prime / 10 ** 9} THz. We had to go {octave} octaves up to arrive there") # outputs: C in the range of light has f == 561846146826.24, which is 561.84614682624 THz. We had to go 31 octaves up to arrive there We can look up colour charts like [0] or [1] and find that this frequency is in fact associated with the colour green. The rest of your commentary seems valid. [0] https://en.wikipedia.org/wiki/Visible_spectrum https://en.wikipedia.org/wiki/Visible_spectrum [1] https://sciencestruck.com/color-spectrum-chart https://sciencestruck.com/color-spectrum-chart

acjohnson55 2y ago
Perceptually, the C pitch class and the color green have nothing to do with each other.
davay 2y ago
Exactly! It's all made visual and interactive here https://chromatone.center/theory/interplay/spectrum/ https://chromatone.center/theory/interplay/spectrum/ - you can even slide the tuning of A4 by dragging left-to-right the last graph - it will show the distribution on 44th octave notes along the visual spectrum
keymasta 2y ago
Not sure why I got down voted but the parent has deleted their post so ok! :D

deleted 2y ago

[deleted]