My new piece of music. Learning how to compose music on Fl studio and then finish the touch ups on Finale.
Thursday, April 24, 2014
A
measure of consonance. I'll test it later. (Consonance is not a
measurement of how good pitches sound, but instead how long two waves of
different periods must be propagated in order to have them sync back
up. Like setting two toy trains moving the same velocity on two circular
tracks of differing circumferences and timing how long it takes the
trains on the short track to catch up with the train on the longer
track.)
Sounds that take longer are regarded as more distinct because they literally just don't pair up often.
Doing the inverse of the first formula, get F(n-2)=F(n-1)/F(n). Should use modulus operators, but MEH. If want tangent, which is F(3), we know that this is F(2)/F(1) = F(3), and since F(2)=Sin and F(1)=cos, Sin/Cos = Tan. cos^2+sin^2=1, 1^2+tan^2 = sec^2, cot^2+1^2=csc^2
Calculator can't tell you how to use it or remember each one or all the formulas that relate them.
In that animation, the angle of that triangle in the circle and the height of the triangle are correlated by the sine function. Cosine is the base. But only when the radius of the circle is 1. Else it's r*cos(angle) or r*sin(angle)
Now, looking at that triangle I showed you at first, it is clear that when the height is 1, the base is zero, and vice versa. When sin(0) = 0 since at zero degrees the height is zero. sin(90) = 1 since the height is of the triangle becomes equal to the radius at 90 degrees. cos(0) = 1, since cosine is just the base length and the triangle is all base at an angle of zero. Tan is the slope, because it is a ratio of y/x, which in this case is Sin/Cos or Height/Base
All
of this can be used to do things like find out how tall something is
without ever reaching it, based on angles a multiple positions. It is
also how triangulation works, and this helps to locate where you are
using only a few cell towers.
Working
on logic. I think understanding 'or' to mean 'union', 'and' to be
'intersection' and 'xor' as it is, this become a lot less confusing.
I wanted, basically, to give xor for two circle in three, so I had to admit c using the "implies" operator.
((A xor B ) and not C) or (B xor C and not A) = (A and B and C) xor A xor B xor C
or
((A xor B) and not C) or (B xor C and not A) = (A and B and C) xor A xor B xor C (Translated by Bing)
Because
the difference (x+1)^(1/2)-x^(1/2), as x approaches infinity,
approaches zero, we are allowed to say that this approaches the
derivative of the first term, with respect to x. That is, if the
function is becoming more like a horizontal line as our position on the
x-axis increases toward infinity, the better a line approximates the
change over any sub-interval starting from your position to any position
ahead.
A conjecture, related to the prime sieve list length.
function primes = Sieve(x)
primes = 2;
feature accel on
for i=1:x
vi = primes(end)+1:2*max(primes);
for j=1:i
vi = vi((vi/primes(j)-floor(vi/primes(j)))~=0);
end
primes = [primes vi];
end
feature accel off
end
primes = 2;
feature accel on
for i=1:x
vi = primes(end)+1:2*max(primes);
for j=1:i
vi = vi((vi/primes(j)-floor(vi/primes(j)))~=0);
end
primes = [primes vi];
end
feature accel off
end
Related to finding a good way to preallocate for the prime list.
Probably
will convert the values to strings and stick them in a cell array with
an approximately appropriate reallocated length, and then just get rid
of empty cells.
I would use it for x>6,
rather, x>=6
rather, x>=6
Sunday, April 13, 2014
The
only thing I don't get about the orbifold representation of chords is
that chord inversions do actually effect the transition probabilities
from chord to chord in most musical styles, because many musical pieces
are composed voice by voice, and there is even correlation over time
that gives rise to such techniques as suspensions and anticipations.
(D-G-Bb) ---> (D-F#-A) are very near when inversion is taken into
account, and it is easy to see that the pedal tone on D is justified by
way of the progression G minor (2nd inversion) ---> D major (root)
"Observe
what happens when sunbeams are admitted into a building and shed light
on its shadowy places. You will see a multitude of tiny particles
mingling in a multitude of ways... their dancing is an actual indication
of underlying movements of matter that are hidden from our sight... It
originates with the atoms which move of themselves [i.e.,
spontaneously]. Then those small compound bodies that
are least removed from the impetus of the atoms are set in motion by
the impact of their invisible blows and in turn cannon against slightly
larger bodies. So the movement mounts up from the atoms and gradually
emerges to the level of our senses, so that those bodies are in motion
that we see in sunbeams, moved by blows that remain invisible."Lucretius
Math and Religion
Even
if there are any infinite number of mutually exclusive religions each
with a probability of some unique negative integer power of two, such
that;
1/2,1/4,1/8,1/16...
And your religion is that which bears the probability 1/2, then the probability of your religion not being the right one is equivalently 1/2, since the limit of the series is 1. And even this is far too generous, since we assumed many things we were unaware of, such as
1.) There is a true religion
2.) The probability distribution for truth of all mutually exclusion religions may be given as the series 1/2+1/4+1/8...
3.) Supporting evidence that would allow partial construction of a probability distribution.
4.) The highly fortunate circumstance that the religion ascribed to by the believer is assigned the highest probability of truth of any single religion within the distribution.
Without these assumptions, however, the situation of choosing the correct religion is nearly impossible. And if faith is the only evidence one has for the correctness of their religion, anyone else's faith in any other belief is just as potent a demonstration of truth, which then lends equal probability to these contrasting assertions.
1/2,1/4,1/8,1/16...
And your religion is that which bears the probability 1/2, then the probability of your religion not being the right one is equivalently 1/2, since the limit of the series is 1. And even this is far too generous, since we assumed many things we were unaware of, such as
1.) There is a true religion
2.) The probability distribution for truth of all mutually exclusion religions may be given as the series 1/2+1/4+1/8...
3.) Supporting evidence that would allow partial construction of a probability distribution.
4.) The highly fortunate circumstance that the religion ascribed to by the believer is assigned the highest probability of truth of any single religion within the distribution.
Without these assumptions, however, the situation of choosing the correct religion is nearly impossible. And if faith is the only evidence one has for the correctness of their religion, anyone else's faith in any other belief is just as potent a demonstration of truth, which then lends equal probability to these contrasting assertions.
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