6)  Chord/Scale Relations

As well as providing a set of notes for creating melodies, scales can help us find chords which suit the key of a piece of music.

Several times so far, we have indicated that certain chords are suited to particular scales more than other chords.  In fact, every chord is related to several scales, and every scale is related to several chords.

There is an rich web of relationships between chords and scales, and understanding how to use them is very important for many aspects of music, especially with improvisation and songwriting.

When improvising over a particular chord progression, we can find related scales which are suitable for playing with the individual chords or the entire progression.

In other words, the harmonic structure of the chord progression gives us guidance for creating the melody.

When songwriting in a particular key or scale, we can find related chords which are likely to be good choices to support the melody and help us build a chord progression.

In other words, the melodic structure of the song's scale gives us guidance for creating the harmony.

Both of these processes are covered in more detail later.  In this tutorial we are going to examine how different chords and scales are related to each other, by the notes that they share in common.  

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