# 15 equal temperament

In music, 15 equal temperament, called 15-TET, 15-EDO, or 15-ET, is a tempered scale derived by dividing the octave into 15 equal steps (equal frequency ratios). Each step represents a frequency ratio of 15√2 (=2(1/15)), or 80 cents. Because 15 factors into 3 times 5, it can be seen as being made up of three scales of 5 equal divisions of the octave, each of which resembles the Slendro scale in Indonesian gamelan. 15 equal temperament is not a meantone system. (Wikipedia).

Factorial Notation (2 of 3: Formal definition)

More resources available at www.misterwootube.com

From playlist Working with Combinatorics

Factors and Primes: Product of Prime Factors (Grade 4) - OnMaths GCSE Maths Revision

Topic: Factors and Primes: Product of Prime Factors Do this paper online for free: https://www.onmaths.com/factors-and-primes/ Grade: 4 This question appears on non-calculator higher and foundation GCSE papers. Practise and revise with OnMaths. Go to onmaths.com for more resources, like p

Rounding to the Tenth

Practice rounding a number

From playlist Geometry

Summer of Math Exposition 2022 - Mathematics and Music

"Better Late Than Never". I started taking Guitar lessons for the first time in my life in 2022. So I wanted to use Math to describe some musical concepts. This is a very rough draft and I wanted to share more but it's August 15th 2022. I created a slightly better video last year: h

From playlist Summer of Math Exposition 2 videos

Equivalent ratios

This is a short video tutorial on equivalent ratios. ✤ ✤ ✤ INTERACTIVE APPLETS AND WORKSHEETS ✤ ✤ ✤ http://fearlessmath.net ✤ ✤ ✤ FOLLOW ME ON TWITTER ✤ ✤ ✤ http://twitter.com/dhabecker

From playlist All about ratios and proportions

Factors and Primes: Product of Prime Factors (Index Form) (Grade 4) - OnMaths GCSE Maths Revision

Topic: Factors and Primes: Product of Prime Factors (Index Form) Do this paper online for free: https://www.onmaths.com/factors-and-primes/ Grade: 4 This question appears on non-calculator higher and foundation GCSE papers. Practise and revise with OnMaths. Go to onmaths.com for more reso

The Mathematical Problem with Music, and How to Solve It

There is a serious mathematical problem with the tuning of musical instruments. A problem that even Galileo, Newton, and Euler tried to solve. This video is about this problem and about some of the ways to tackle it. It starts from the basic physics of sound, proves mathematically why s

From playlist Summer of Math Exposition 2 videos

Metauni event #3: Lucas Cantor presents Music @ Metaverse

Lucas spoke on the emerging role of AI in music, and how this brings into focus some of the arbitrariness about the way we construct music, using the example of equal temperament. There was a very interesting question and discussion period after the talk, which among other things touched o

From playlist Metauni

Ex 1: Determine Equivalent Fractions to a Given Fraction

This video provides an example of how to determine several equivalent fractions to a given fraction. Search Complete Library: http://www.mathispower4u.wordpress.com

From playlist Introduction to Fractions

The Sum of the Factors of 11!

How would one sum the factors of a number so immense as 11 factorial? 11! = 39916800 has 540 distinct positive factors, most of them very large. It turns out that, when cleverly arranged, the factors of 11! and any number in general lend themselves nicely to summation. In this video, I dem

From playlist Fun

The History, The Power and the Perspectives of Numerical Simulations of Spin... by Enzo Marinari

DISCUSSION MEETING : CELEBRATING THE SCIENCE OF GIORGIO PARISI (ONLINE) ORGANIZERS : Chandan Dasgupta (ICTS-TIFR, India), Abhishek Dhar (ICTS-TIFR, India), Smarajit Karmakar (TIFR-Hyderabad, India) and Samriddhi Sankar Ray (ICTS-TIFR, India) DATE : 15 December 2021 to 17 December 2021 VE

From playlist Celebrating the Science of Giorgio Parisi (ONLINE)

How Pythagoras Broke Music (and how we kind of fixed it)

How does music work? What did an Ancient Greek philosopher have to do with it? Why did he keep drowning people? Discover the answers to these questions and more as we take a tour through musical tuning systems, examining how the power of mathematics has helped us build and rebuild our met

From playlist Mathematics

17.5 Transverse Standing Waves

This video covers Section 17.5 of Cutnell & Johnson Physics 10e, by David Young and Shane Stadler, published by John Wiley and Sons. The lecture is part of the course General Physics - Life Sciences I and II, taught by Dr. Boyd F. Edwards at Utah State University. This video was produced

NUMBERS: "i", the Number of Heaven | Five numbers that changed the world | Cool Math

NUMBERS - secrets of Math. Mathematics is shrouded behind a veil and does not easily reveal itself. Students resort to rote memorization of math formulas to solve problems in a boring exercise of the mind that is also repetitive. However, if you knew the history of mathematics, the way the

From playlist Civilization

Proportion Practice

Practice with inequalities and proportions

From playlist Middle School - Worked Examples

This Mona Lisa video has been updated, please see: https://youtu.be/B06PK4yZwvY

Psych9B. Psychology Fundamentals. Lecture 15

UCI Psych 9B: Psych Fundamentals (Fall 2015) Lec 15. Psych Fundamentals View the complete course: http://ocw.uci.edu/courses/psych_9bpsy_beh_11b_psychology_fundamentals.html Instructor: Mark Steyvers, Ph.D. License: Creative Commons CC-BY-SA Terms of Use: http://ocw.uci.edu/info. More cou

From playlist Psych 9B: Psych Fundamentals

Conversion Arcs and 2,916,485,648,612,232,232,816 (MegaFavNumbers)

I'm sorry. The MegaFavNumbers playlist: https://www.youtube.com/playlist?list=PLar4u0v66vIodqt3KSZPsYyuULD5meoAo

From playlist MegaFavNumbers

What Makes Us Who We Are? The Promise (and Perils) of Behavioral Genetics

Sponsored by the Poynter Fellowship in Journalism and Franke Program in Science and the Humanities. Why are some of us happier than others—or sadder, tougher, or friendlier? Why do some wither under stress while others survive mayhem? Drawing on research for his upcoming book, "The Orchi

From playlist Franke Program in Science and the Humanities