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Jazz Scale - The Altered Scale

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The altered is a very common scale in the jazz style. Since it (as its name applies) contains many alteration it of used to create colour and supplies a great structure for colourful chords which we'll learn to build once we're familiar with the scale.

The altered scale Play Audio

As you can see the scale is built out of seven notes that contain all the lowered notes in relationship with the major scale.

Accept from the root note all the notes of the major scale have been lowered.

Some people find it easier to spell the scale in this way:

The altered scale spelled differently.

The spelling of the scale in this way is less clear since it doesn't indicate the presence of a full scale but just a combination of note but hey! If it works for you, who am I to interfere :)

An easy way to remember this scale is by raising the root note of a major scale in half a tone.

So in order to play C altered we would play B major then raise the root note.

B major before raising the root note. The altered scale was formed by raising the root note of B major.

You can look at it also in another way. Understand that this scale is actually a melodic minor scale starting from the seventh degree.

C altered is actually a C# melodic minor starting from the seventh degree.

Playing the altered scale as the 7th degree of a melodic minor scale.

Chords in the altered scale

The altered scale is often being played in jazz. It is often used to be played when a seventh chord is played in the left. The reason this occurs is because the scale contains the major third and the lowered seventh note in relationship with the root note of the scale.

The 3rd and 7th notes in the altered scale.

In II-V-I progressions we will often use this jazz scale in the dominant as long as it is played with the correct alterations.

Let's have a look first at the possible Seventh chords we can create in C altered for example.

Example for 7th chords we can use with the alterations of the altered scale.

Play Audio

These are the common possibilities we can use in II-V-I examples.

The next II-V-I chord progression allows us to use the altered scale in the dominant since it is altered with a lowered 9th and or 13th.

A II-V-I example with a dominant altered by the altered scale. Play Audio

Click here to read about adding or lowering the 9th, 11th and/or 13th to jazz piano chords.

Here's a free piano chord chart of all 12 altered scales.

Other jazz scales you might want to be using when improvising are:

The whole tone scale (coming soon)

The Octatonic scale (coming soon)

The major scale

The minor Scale

The Music modes

Return from Jazz Scale - The Altered Scale to Piano Theory


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