BUILD AN ENTROPY SYNTHESIZER
This is not one entropy synthesizer but several in various stages
of being built. An entropy synthesizer is a noise generator that
sounds musical, and has controls for making music without
radio or recording media. For the past 10 years none have
been run on computers because of the bizarre way the sound
is made, no GUI programmer has been even able to translate
the original entropy synthesizer software, which contained only
26 bytes of machine language embedded in a short BASIC
program, written by an 11 year old child who thought that
synthesizers were radios with brains that made up music.
Without the simple 8-bit computers, the entropy synthesizer
is now only run on chips. Sound that was transferred to the
sound gallery was done using a somewhat tedious process of
transfer from an 8-bit machine to a PC, not in real time as the
standalone devices do. One 8 bit machine can output to
audio and video at the same time, the same data, in real time.
This is an older sound-only Entropy Synthesizer.
These are also called "Mars radios".
The algorithm in this is LIKE an LFSR or a CA.
The buttons perturb the algorithm in various ways.
Entropy synthesizers can easily do CA's, but the
256 rule set has never as of 8-14-2005 been run
on an entropy synthesizer. Only a few years ago
was it realized that these always generated Triangle
It is recent for entropy synthesizers to generate
stereo sound. The strangeness of their sounds is
extremely intense as binaural beats. The entropy
synthesizer has been used in the past as a test pattern
for "Neurophone" activity. In 2000, we transmitted
sensations to the nervous system but was not able
to control (modulate) the powerful coils with the N-synth.
The typical bandwidth of an entropy synthesizer
is 3 MHz, but when burned to a CD only 44100
samples are taken.
Like an LFSR, the original N-synth had a circular
universe. And on average, 2^2^6144x8 possible
Since 2000, hundreds of new tweakable noises
have been discovered that run on the entropy synthesizer.
As many as possible, I will attempt to make into mp3 files.
No entropy synthesizer ever used more than 64K,
with 8K being typical. The smallest one ever made
had no processor and no RAM, and still generated
the typical sound of the original one. And that one
is connected to a solar cell and a long wire, and
just runs "WILD" in a tree in a forest at 1842000 Hz.
ERP is a few microwatts, you have to know where
the thing is to hear it on the radio. Many N-synths
have antennas so you can use a radio to hear their
This is a fantasy, because N-synths are called Mars radios,
and the music they make, people say it sounds like it's
from Mars. The N-synth antennas do nothing but fake a radio.
A keyboard has never been used with an N-synth yet.
The keyboard will be used to musically control (play) one.
And also to exploit the new memoryless feature.
The Berlekamp-Massey algorithm can generate a seed
for an entropy synthesizer that will cause it to play a
song. But many new and better ways are known for
finding good music in N-synths now.
The memoryless entropy synthesizer consists of one
binary counter split in half and the bits logically AND
in pairs, and then OR together. That also makes a
triangle fractal. That will probably be explained more
in the form of a schematic soon. Some variety is possible
even with that minimal circuit, which has switches to
control the logical gates.
All entropy synthesizers use pulse width modulation
to generate analog sound.
More information is forthcoming.
In the meantime, why not take a look at some other
similarly weird noisemakers at:
or how to make a 3D projection TV or VR system:
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