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Basic Music Theory Part 1

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BASIC MUSIC THEORY (from musicologize) 

PART 1 

What’s a note? 

A ​note​ is a frequency or pitch. If you’re by yourself, sing and hold the pitch steady. For our 

purposes, that’s a ​note.​ And no matter what random pitch you just sang, we can call that 
note​ by a letter name A, B, C, D, E, F, or G. The letter names cycle, meaning the ​note​ that 

follows “G” is “A.” There is no “H.” ​Notes​ also have duration. And ​notes ​are perhaps 
distinguishable from “pitch” and “tone” by whether they’re heard, performed, or written 

down (notes and notations are written things), but we’re not concerned about any of that in 
this lesson. Next… 

What’s a scale? 

A ​scale​ is a series of ​notes​ in order of pitch. For example, “C, D, E, F, G, A, B, C” is a 


scale;​ seven ​notes​ and then it cycles again to C. But “C, E, D, G, F, B, A, C,” is not a 

scale​ because it’s hopping all around; it’s not directional. ​Scales​ don’t need to contain 
exactly seven ​notes​. They just often do. Next… 

What is an interval? 

An ​interval​ is the distance between any two letter-named ​notes​. We can count it on our 
fingers. For example, let’s take A and E. The ​notes​ A and E have an interval of five. We 

count the first ​note​ of an interval as “one.” There is no zero. It’s an inclusive counting 

thing. So, on our fingers, A is one, B is two, and E will be five. So the A to E interval is five. 
If we play two ​notes​ together, we get ​“harmony”​ (the sound of more than one ​note​ at a 
time) and we would call this particular harmony a “fifth.” A to E is a “fifth.” Note however 
that A to E is not the same interval as E to A. Direction matters! On your fingers, if E were 

“one,” then F is two, G is three, and A will be four. So the interval A to E is five or “a fifth,” 
but the inverse, E to A, is four; “a fourth.” 

What are ‘whole steps’ and ‘half steps?’ 

A ​“half step”​ is the distance between two adjacent notes, and a ​“whole step”​ is two ​half 
steps. ​It’s a bit like half-teaspoons and teaspoons. A “step,” whether it’s ‘half’ or ‘whole,’ 

is the distance from one note in a scale to the next or to the former. But ​“half step”​ is the 
far more useful term because it lets us describe the precise distance between two ​notes​, 
as in, ​“exactly how many piano keys away from “C” is “F?​“ 

Answer: It’s five half-steps away. 

What are ‘sharps’ and ‘flats?’ ​Sounds important, but I might’ve skipped this altogether if 
we didn’t have five whole minutes left to kill. 

Picturing that piano? The ​sharps and flats​ are the black keys, and you probably knew 
that. This being a theory lesson though, let’s be at least minimally theoretical about it… 

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