Below is a list of links to resources

NOTE: I will obviously list only websites that are accessible at the time of posting.
We all know that many websites become inaccessible.
I will do my best to identify those that become inaccessible and try to replace them.

Table of Color Matching Functions for Wright-Guild primaries The color matching functions are primed instead of being overbarred.
By clicking on the link, the EXCEL file will be downloaded into your computer.
TCMF Wright Guild

Table of Color Matching Functions for sRGB primaries
By clicking on the link, the EXCEL file will be downloaded into your computer.

sRGB_TCMF_10nm-July-2018 1PM


Superposition of a traveling wave along with its reflected traveling wave

to form a STANDING WAVE. Press  “START” to view the animation

Standing Wave from two Traveling Waves
 The following video displays an animation of the shape of a string when it is bowed.
The source is
This website is rich in wonderful animations and information about wave propagation.



The following YouTube is an actual filming in slow motion of a bowed string displaying its stick/slip behavior

Stick Slip Motion of a Bowed String



Amplitude and Frequency Modulation Applet 

Scroll to the bottom of this webpage so that you can see a window of a modulated wave. The first will be an amplitude modulated (AM) wave; the second a frequency modulated (FM) wave.

You can vary the modulation frequency as well as the amplitude of modulation and observe the changing wave form as well as the resulting frequency spectrum.

For FM, there are three frequencies involved: [1] the carrier frequency (central frequency of a violin that determines its pitch; [2] the modulation frequency (rate at which the violinist’s finger oscillates); [3] the maximum absolute value of the change in the frequency from the carrier frequency – expressed as the modulation frequency, which is the ratio of the maximum change in frequency divided by the modulation frequency.


BEATS  —  a Wolfram Demonstration Project CDF file needing  the freely downloadable CDF Mathematica program


USING a TEKTRONIX oscilloscope


A Simple Buzzer – Animation by David M Harrison

Converting sounds into images for the blind.


Informative webpage on Tunings: Just vs. Equal Temperament – info plus sound files


 Visualization of the Beauty of Just Tuning in comparison with Equal Temperament in ‘Lissajous figures’


METAMERS: Spectral Intensities that produce the same color sensation.
Move your mouse within the left box to trace out a spectral intensity of your choice.  You should see a color patch corresponding to that spectral intensity below along with a histogram of the monitor color coordinates RGB.  Do the same for the right box. Finally, try to produce two spectral intensities as different as possible yet which produce the same color.

You can also download a JAVA file from the website so as to have the file within the computer. Have fun!

Here is an example of what you’d see:


Conversion from one set of color coordinates

Calculates the coordinates in many color standards given the color coordinates in one of them.


RGB values or HSL (Hue-Saturation-Luminance) values of a point in a Color Circle

Color Coordination Algorithm by Petr Stanicek

As we have mathematical recipes for producing pitches in music that are consonant/harmonious many students of color have proposed algorithms for producing a set of colors that appear richly pleasing to us. They focus on a set of primary  colors consisting of RED, YELLOW, and BLUE, as opposed to RED, GREEN, and BLUE. Petr Stanicek has produced the system based upon the RYB primaries displayed on his website.

This video that I posted on YouTube was made using Stanicek’s WEBSITE:
My hope is that the video will give you an appreciation for the beauty of Petr Stanicek’s website for producing patches of harmonizing colors.


SHARP corporation account of their 4-primary monitor

Regarding the Sharp corporation’s claim of their Quattron TV providing trillions of colors: the link that was provided in the 1st edition of the textbook is no longer accessible (as of 8-2012). Here is a link that is currently {8-2012) accessible.


Crushing a soda can by using the external air pressure.

Boiling water in a soda can replaces the air by steam. Subsequently dipping the soda can upside down into a bowl of water condenses the steam within the can and reduces the pressure so much that the surrounding air crushes the can.


Richard Feynman – my hero of a Physicist

Open this website for the Entire interview on YouTube.

The other YouTubes  are segments of the interview.


The Importance of a Father

Feynman on Elitist In-groups

Richard Feynman on God


Photos by Kostas Metalinnos

Our TA is an accomplished photographer. Here is a link to some of his works.
Contact Kostas (by email only) in case you are interested in learning more about his technique and also in case you would like to meet with him on a photography escapade on the roof of the Tisch Library.



The Power of Music – Cateura, Paraguay



Thousand Hand Guan Yin

Here is a link to a YouTube video of amazing group of dancers, all deaf. Their ability to keep time and express time in the ultra-fine movement of their bodies reflects an incredible level of internal time integrated with an extreme high level of kinesthetic sense.

I have added this link to this website because music is typically based essentially though not entirely upon the union of time and pitch. While musicians make use of melodic development to shape time, these dancers use spatial body movement to shape time.

Note the presence of the directors, dressed in white, who communicate the evolution of the music to the dancers.



Website with a wealth of sounds from all around us: musical, natural physical phenomena, animals, ….



This is a link to download the program AUDACITY, which is a freeware that allows you to input audio, view its waveform, edit it in various ways – including loudness and tempo, as well as obtain a spectral analysis.