Chord Theory Pt. 1 of 2 - Using Scaler for Modal Interchange @Baphometrix
Chord Theory Pt. 1 of 2 - Using Scaler for Modal Interchange  @Baphometrix
Uploaded April 2018 | Updated September 2026, 1 week ago
UPDATE: Also look for Part 2 of this series. See below for details.

This is Part 1 of the essential intermediate harmonic (chord) theory that producers need for creating rich and interesting chord progressions. In this video I explain how to build chord progressions that are based on a "Regular Cadence", and I also explain how to add spice and interest to these chord progressions by using in-scale substitutions and modal interchange.

Scaler makes building progressions like this dirt easy with only a small handful of easy-to-remember rules and concepts that you need to understand.

In Part 2, I explain how to build chord progressions that are based on a "Half Cadence". After absorbing the simple ideas in Parts 1 and 2, you will know 95% of everything there is to know about writing chord progressions, and you'll be able to -understand- why some neat chord progression you're looking at actually works!

Link to Part 2: youtu.be/cV3srv2Wq3M

IMPORTANT: I strongly recommend you first watch great 4-minute video to have some context for the stuff I show in this video. Go watch it, then come back here!
youtu.be/1dRA28cdt5c


APOLOGY: I realized belatedly that I forgot to mention how to write melodies that work over chords borrowed from other scales/modes. Thankfully, that's super easy and the other 4-minute video linked to above describes that just as well as I could.


Where to find Scaler:
pluginboutique.com/product/3-Studio-Tools/72-Utility/3933-Scaler

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HARMONIC THEORY IN A NUTSHELL - Part 1 of 2

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Cadences:

5 to 1
4 to 1

Note: Cadences do have a bit more depth than this. What I've listed is definitely how you want to end a chord progression before looping it around, like the period that ends a sentence. However, there are some other cadences you can employ inside the chord progression, like the comma that separates two thoughts in a sentence. Check the following link for deets:
web.archive.org/web/20190619015057/https://www3.northern.edu/wieland/theory/harmony/cadences.htm

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The Magic Chords:

1 4 5 6

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In-Scale Chord Substitutions:

1 3 6
2 4
5 7

Wherever you see a 3, think of it as "really being a 1 or 6"
Wherever you see a 2, think of it as "really being a 4"
Wherever you see a 7, think of it as "really being a 5"

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Rules for Sweet-Sounding Chord Progressions:

1. Nearly always end with a Cadence (5 to 1 or 4 to 1)
2. Start with any chord number you want, but 1 is always a "safe"
choice
3. Put literally anything you want in the middle between the starting
chord and the cadence
4. Substitute nearly any 1 with 3 or 6 instead, any 3 with 1 or 6, or
any 6 with 1 or 3
5. Substitute nearly any 4 with 2 or vice-versa
6. Substitute nearlay any 5 with 7 or vice-versa
7. Borrow the same chord number from any other scale/mode with
the same tonic (root)

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Rule for Sweet-Sounding Melodies when using borrowed chords from other scales/modes:

Simply use scale tones from the borrowed mode in the section where that borrowed chord is playing
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Chord Theory Pt. 1 of 2 - Using Scaler for Modal Interchange

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