Riff

Month 3 — Modes, Expression & Composition (Graduation Semester) · Week 10

Intro to Mixolydian + Two Identity Notes: the Tension of ♭7 (G) and the Resolution of the Major 3rd (C#)

about 50 min

Theory

Here's why we're doing this today: last week, we colored minor chords with the Dorian ♮6. This week, it's the other side's turn — the dominant 7th chord. Put on an A7 backing track and just scrape through A minor pentatonic... it's not wrong, exactly, but it's a little flat, right? That "sounds bluesy but kind of bland" feeling. Today's scale is what flips that switch: A Mixolydian.

A Mixolydian = A B C# D E F# G. It's the major scale with exactly one note lowered a half step — the 7th (major 7th G# drops to minor 7th G). So this scale's whole identity comes down to just two notes.

  • Major 3rd = C# — the note that announces "this is major." It's bright, and when you land on it, your ear goes "ah, we're home" — it's the resolution.
  • Minor 7th (♭7) = G — Mixolydian's signature. This note tells the chord "you're not just major, you're dominant — you want to go somewhere," giving it that itchy tension.

The key is the relationship between the two. You hang tension with G (♭7), then release it with C# (major 3rd). If you've been living only in minor pentatonic territory, you probably never touch this C# (major 3rd) at all. So everything comes out sounding dark, like minor. New rule starting today: over A7, always use C# as a landing note. The instant you arrive on C#, your solo stops sounding like "blues impersonation" and starts being "real dominant."

And one spoonful of blues seasoning. We'll slip in the minor 3rd, C (♭3), as a blue note. C isn't an official scale member — it's the crooked note sitting a half step below C# (the major 3rd). Brush past it, or bend it up a half step to resolve C → C#, and you get that famous "gritty" bluesy Mixolydian sound. Same rule as Week 4: a blue note is a waypoint on the road to the major 3rd, not the destination. Camp out on it and it's a wrong note; pass through it and it's a great lick.

Today, the goal is to get Position 1 comfortable in your hands, and be able to find G (♭7) and C# (major 3rd) inside it with your eyes closed.

See it

First, here's A Mixolydian Position 1. The root A sits at the 6th string, 5th fret. Pay close attention to the two kinds of highlights — the major 3rd C# (resolution, green) and the ♭7 G (tension, yellow). These two colors are today's stars.

Second, a tension-resolution map of the two identity notes. G (♭7, tension) and C# (major 3rd, resolution) are placed side by side within one hand position, plus the blue note C (♭3) layered in between. See how C (3rd string, 5th fret) resolves up just one fret to C# (3rd string, 6th fret)? That's today's picture to burn into your ear.

Third, today's bluesy lick. Bar 1 starts on the root, then half-step bends the blue note C up to resolve on C# (major 3rd); bar 2 hangs tension on the ♭7 G, then settles down onto C#, finishing with vibrato. This one lick is a summary of everything we covered today.

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A Mixolydian - Position 1 (major 3rd C# & b7 G)
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Identity notes: b7(G) tension -> major 3rd(C#) resolution, with b3(C) blue note
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Bluesy Mixolydian lick (b3 blue note -> major 3rd, b7 tension -> 3rd)

Today's practice

0–10 min · Warm-up (BPM 90) — waking up the shape with a 4-note sequence With the metronome at 90, run Position 1 ascending in groups of four sixteenth notes. No just scraping up and down the block. Push upward "four notes at a time": A-B-C#-D / B-C#-D-E … like that. Every time you pass through C# (major 3rd), mentally stamp it: "this is the bright one!" If your hand tenses up, drop to BPM 80.

10–20 min · Brain training (targets = G and C#) Metronome off. In Position 1, find just ♭7 G in its two spots (4th string 5th fret, 2nd string 8th fret) and fret them, saying "this is tension" out loud each time. Next, find just major 3rd C# in its two spots (5th string 4th fret, 3rd string 6th fret), saying "this is resolution." Finally, fret one G, then move to the nearest C# — repeat this move 5 times. You pass when you can fret G and C# with your eyes closed within 3 seconds.

20–40 min · Real-world feel (A7 one-chord backing / 80–90 BPM) Put on an "A7 vamp backing track" or "A7 groove jam." One mission: always land on C# (major 3rd) whenever you end a phrase. Feel free to play around like pentatonic in the middle. But the period at the end of every sentence is always C#. If you've got room, weave in today's bluesy lick (C→C# half-step bend) two or three times. Success is when landing on C# gives you that "click" feeling of locking into the backing track.

40–50 min · Record & reflect (recommended) Record 30 seconds of your last jam with any recorder (voice memo app works fine). Listen back and check just one thing: did my phrase endings really stop on C#, or did they habitually drift to the root A or the ♭3 C? If they didn't stop on C#, that's the habit to fix tomorrow.

Today's completion criteria: Fret G and C# individually in Position 1 with your eyes closed. Land phrases on C# at least 8 times over the A7 backing. Successfully resolve the blue note C→C# with a half-step bend.

  • The C# (major 3rd) skip. The most common one. Minor pentatonic muscle memory makes you unconsciously skip C# and stay stuck on C (♭3). That makes it sound like plain minor, not dominant. Today, consciously plant C# at the end of your sentences.
  • Camping out on the blue note C. C is a waypoint to the major 3rd, not a final stop. Bend it up a half step to resolve to C#, or just brush past it. Linger too long and it becomes a "wrong note."
  • Scattering ♭7 G everywhere. G is a strong tension note, and if you hold it as a landing note too long, it feels floaty and unresolved. Use G as a light seasoning of tension, then quickly release it to C# or the 5th, E.
  • Chasing tempo. Even if 90 feels frustratingly slow, today is all about burning in the positions and colors. Fretting slowly while saying "C#... G..." out loud will do more for this whole week than fast, sloppy scraping.