Improvising on guitar means creating musical ideas in the moment. The more clearly you understand the scales, chords, and sounds you’re working with, the easier it becomes to turn what you hear into something you can play.

In this lesson, we’ll look at six areas that support improvisation: scales, diatonic chords, modes, playing over chord progressions, transcribing, and improvising over songs.

1. Know your scales

Scales give you a set of notes to work with when you’re creating melodies and riffs. The better you know where those notes are on the fretboard, the easier it becomes to focus on the musical idea instead of searching for notes.

Start with familiar scales such as the Major scale, natural minor, pentatonic, and blues scales. These give you plenty of material for practicing improvisation across different musical settings.

As your harmony knowledge grows, you can also explore sounds such as melodic minor, harmonic minor, modes, and other specialty scales.

Scale formulas for improvisation

The formulas below are a reference for several scales commonly used in improvisation. The numbers represent the scale degrees in relation to the root.

• Major scale: 1, 2, 3, 4, 5, 6, 7
• Minor scale: 1, 2, b3, 4, 5, b6, b7
• Major pentatonic scale: 1, 2, 3, 5, 6
• Minor pentatonic scale: 1, b3, 4, 5, b7
• Major blues scale: 1, 2, b3, 3, 5, 6
• Minor blues scale: 1, b3, 4, #4, 5, b7
• Melodic minor scale: 1, 2, b3, 4, 5, 6, 7
• Harmonic minor scale: 1, 2, b3, 4, 5, b6, 7
  

Scale examples

The examples below let you compare the sound of several scales from the same C root. Listen for how changing only a few scale degrees changes the overall character of the scale.

C Major scale

C Minor scale

Here is the C natural minor scale. This is different from the melodic or harmonic minor scale which we’ll look at next.

C Melodic minor scale

C Harmonic minor scale

2. Understanding diatonic chords

Diatonic chords help you recognize which chords belong to the same key. When a progression stays within one key, one parent scale can often give you a clear starting point for improvising over the progression.

For example, if several chords all come from C Major, you can begin with the C Major scale and listen to how its notes interact with each chord.

If we build triad chords upon each scale degree of the Major scale, we naturally get different chord qualities such as Major chords, minor chords, and a diminished chord.

Here are the chord tones that belong to each chord quality:

• Major: 1, 3, 5
• Minor: 1, b3, 5
• Diminished: 1, b3, b5

If we take a Major scale and stack triads above each note, we naturally derive these chords from each scale degree.

• 1st degree: Major
• 2nd degree: minor
• 3rd degree: minor
• 4th degree: Major
• 5th degree: Major
• 6th degree: minor
• 7th degree: diminished
  

Diatonic chords in C

Here is a chart to help you see how diatonic chords are derived in the key of C Major.

Roadmap practice: Choose two or three diatonic chords from C Major and loop them slowly. Use one C Major scale position and create short phrases over the progression. Listen for which notes feel settled against each chord and which notes create more tension.

If a chord progression included these chords, you could use the C Major scale and it would work over all the chords. However, if you see chords with sharps or flats, you have to look at how those chords fit within that particular scale.

For example, if a progression has the chords D minor, C major, and Bb Major, that would be the 6 minor, 5 Major, and 4 Major chord in the key of F Major.

You can also apply this concept with 7th chords which include one more chord tone. Here is a chart of what this looks like in comparison to triad chords.

See how to play half diminished chords (aka minor 7 b5 chords) here if you don’t know them already.

Minor diatonic chords

The diatonic chord qualities for minor keys are the same ones starting on the 6th degree of the related Major scale. For example, the related chords in the key of A minor in both triad and 7th chord form are:

1. A minor or A minor 7
2. B diminished or B half diminished
3. C Major or C Major 7
4. D minor or D minor 7
5. E minor or E minor 7
6. F Major or F Major 7
7. G Major or G 7

As you can see, knowing diatonic chords are helpful to find a key center much quicker so you can apply the right scale over a chord progression.

Keep in mind that songs also change in between keys or sometimes include non-diatonic chords. Regardless, use this concept as a starting point to learn how chords work together before getting into more complex concepts.

3. Understanding modes

Modes give you another way to organize and hear the notes of a parent scale. Each mode has its own root and interval pattern, which changes how the same or related notes function over harmony.

For now, use this section to understand the basic relationship between the seven Major-scale modes. The dedicated mode lessons linked below go deeper into how each sound is applied.

• The 1st mode is called Ionian. This is the sound you get when you play the notes starting on the 1st degree of the Major scale.
  
• The 2nd mode is called Dorian. This is the sound you get when you play the notes starting on the 2nd degree of the Major scale.
  
• The 3rd mode is called Phrygian. This is the sound you get when you play the notes starting on the 3rd degree of the Major scale.
  
• The 4th mode is called Lydian. This is the sound you get when you play the notes starting on the 4th degree of the Major scale.
  
• The 5th mode is called Mixolydian. This is the sound you get when you play the notes starting on the 5th degree of the Major scale.
  
• The 6th mode is called Aeolian. This is the sound you get when you play the notes starting on the 6th degree of the Major scale. (Commonly known as the natural minor scale).
  
• The 7th mode is called Locrian. This is the sound you get when you play the notes starting on the 7th degree of the Major scale.
  

To dive further on this topic, check out the modes and their related emotions in music.

Major scale modes

Here is a chart of the 7 modes related to the Major scale with their respective scale degrees.

7 Modes examples starting on C

Here are examples of the notes of the 7 modes with C as the root note. You also see the related parent scale (where the scale notes are coming from.)

• C Ionian scale: C, D, E, F, G, A, B (C Major parent scale)
• C Dorian scale: C, D, Eb, F, G, A, Bb (Bb Major parent scale)
• C Phrygian scale: C, Db, Eb, F, G, Ab, Bb (Ab Major parent scale)
• C Lydian scale: C, D, E, F#, G, A, B (G Major parent scale)
• C Mixolydian scale: C, D, E, F, G, A, Bb (F Major parent scale)
• C Aeolian scale: C, D, Eb, F, G, Ab, Bb (Eb Major parent scale)
• C Locrian scale: C, Db, Eb, F, Gb, Ab, Bb (Db Major parent scale)

Also, note that many people use the word ‘mode’ with ‘scale’ interchangeably. For example, they might say D Dorian mode or D Dorian scale to mean the same thing. However, you can also think of modes to refer to the sound being outlined in a series of chords.

We can also build different modes from the scales we covered in the previous sections but for this post, we are only covering the modes derived from the Major scale.

4. Practice playing scales over chord progressions

The best way to connect these ideas is to actually improvise over harmony. Start with one chord, then a simple progression where the chords clearly belong to the same key.

Use a familiar scale and create short phrases instead of continuously running the scale. Play an idea, leave some space, then repeat it or change one part of it.

Chord progression example 1

For example, here are four chords in the key of G. A basic way to improvise over this progression is to use the G Major scale.

Roadmap practice: Loop the G Major progression and use one familiar G Major scale position. Improvise for about 30 to 60 seconds using short phrases. Repeat at least one idea, change one ending, and keep the pulse moving if you play a note you didn’t intend.

Chord progression example 2

However, it gets more complex though when you switch between two chords that have a different set of scales.

For example:

G Major to C minor.

Chord progression example 3

Here is another example of two non-diatonic chords in a chord progression and what scale you can use over each of them.

When a chord falls outside the main key, listen to the notes in the chord and the musical context before choosing a scale. The examples above show how a change in harmony may call for a different note set.

As you learn to apply music theory, always let your ears guide you to see if the scale you are using works over a chord progression.

It’s important to learn play the right notes but also to make everything sound musical. You can can do this by using different intervals or patterns which we cover in the lesson: How to practice scales on guitar. You may also want to learn how make your melody lines sound jazzy.

5. Transcribing

Transcribing means learning musical ideas by ear. This could be a short riff, a melody, a few solo phrases, or a complete piece.

After learning a phrase, look at the scale notes, rhythm, and chord underneath it. Then change something about the phrase and try using the idea in your own improvisation.

Think about how we learn a language when we are young by hearing it over and over and eventually make sense of how people use certain words or expressions. We also imitate the language and even though we make mistakes, it eventually becomes second nature to us.

Bassist Victor Wooten said it like this:

“If we approach music in the same natural way we approached our first language, we will learn to speak it in the same short time it took to speak our first language.”

– Victor Wooten

Here is a link to the video where he talks about music as a language.

My Music Composition Notebook is designed to help you capture your musical ideas, featuring printable sheet music tailored for different instruments.

It also includes easy-to-follow guides and references to help you understand essential music concepts and symbols, such as note names on the staff, time and key signatures, note values, and the circle of fifths.

👉 Get it here!

6. Improvise over songs

Songs give you a musical setting where all of these skills come together. Learn the main chord progression and key first, then use the melody and familiar scale shapes as starting points for creating your own phrases.

Listen as much as you think. The goal is not only to choose notes that fit, but to shape them into phrases that respond to the song.

Here are some more things to keep in mind when improvising over a song:

• Use the melody of a song to give a framework for improvising.
• Analyze the chord progression and see how the chords relate to each other. Check if there are any non-diatonic chords and what scales you can use through the chord changes.
• Use scales to make your improvisation sound musical (as if you were to sing it).
• Use repetition to keep your improvisation engaging.
• Connect ideas through your solo as if you are telling a story.
  

You can check out the sheet music with tabs resource to learn songs and practice improvising over them.

Wrapping up

Improvisation brings together several skills: knowing where your scale notes are, understanding the harmony underneath you, listening, and turning those notes into phrases.

Start with a simple musical setting. Choose one familiar scale, play over a progression in the same key, and work on creating short ideas with space, repetition, and variation.

As that becomes more comfortable, the other concepts in this lesson give you ways to expand your choices through chord awareness, modes, transcribing, and improvising over complete songs.

Next, we’ll keep developing the phrasing side of improvisation so your scale knowledge begins to sound more like music and less like an exercise.

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