- [Instructor] We have learned

that there are seven
names to all the notes,

ABCDEFG.

We can now add to that list of seven

all the notes with sharps and flats.

So an A,

then there could be an A sharp,

B, B sharp,

C, C sharp,

D, D sharp,

and so forth.

The same with flats.

A, A flat,

G, G flat,

F, F flat,

and so forth.

Let's go back to our piano keyboard.

From the treble clef middle C,

let's look at the octave above,

the C on the third space.

There are 12 note from the middle C

to the third space C.

These notes make up the chromatic scale.

(plays chromatic scale on piano)

Remember that between E and F

and between B and C

there isn't a black key.

Using sharps,

here are all of the names of the notes

of the chromaic scale.

C, C sharp,

D, D sharp,

E, F, F sharp,

G, G sharp,

A, A sharp, B, C.

The distance between each of these notes

is called a half step

or the interval of a semitone,

also called a minor second.

An interval is the distance
between two musical pitches.

We already know one interval, an octave,

and in future lessons,

we will discuss many intervals,

but for now let's focus on
the interval of a half step.

This is a fundamental building block

of all musical intervals.

A chromatic scale is
made up of 12 half steps.

Now let's look a the chromatic scale

from the third space C in the treble clef

descending using flats.

C, B, B flat,

A, A flat,

G, G flat,

F, E, E flat,

D, D flat, C.

All half steps.

Towards the end of
Rimsky-Korsakov's Scheherazade

in the flute part,

he writes a chromatic scale,

but he uses a combination
of sharps, flats,

and naturals to make this scale,

all half steps,

a chromatic scale.

(dramatic orchestral music)