jp-modulation
Installation
SKILL.md
50 Modulation Techniques (転調テクニック50)
Source: Luna Umegaki (梅垣ルナ), Tenchō Technique 50 — A Practical Collection of Chord Progressions That Expand Your Imagination (転調テクニック50 ―イマジネーションが広がる実践的コード進行集, Rittor Music, 2017). The book contains 50 modulation examples. The home key is always Key=C or Key=Am; degree-name (ディグリー・ネーム, Roman numeral) thinking makes every example portable to any key.
1. Modulation Fundamentals
1.1 Closely Related Keys and Distant Keys
There are 24 commonly used keys (12 major + 12 minor). Taking Key=C as an example, the six types of closely related keys (近親調):
| Relationship | Example (home key C) | Character |
|---|---|---|
| Parallel key (同主調, same tonic) | C ↔ Cm | Major/minor sharing the same tonic; light/dark contrast can be pulled very hard |
| Relative key (平行調 — note: in Japanese this means the relative major/minor, not "parallel" in the English sense) | C ↔ Am | Same key signature, nearly all chords shared; changes the mood with a light touch |
| Dominant key (属調, perfect 5th up) | C → G | Scales differ by only 1 note, many common chords, the smoothest modulation |
| Relative key of the dominant (属調の平行調) | C → Em | Same key signature as G |
| Subdominant key (下属調, perfect 5th down) | C → F | Symmetric with the dominant key, equally smooth |
| Relative key of the subdominant (下属調の平行調) | C → Dm | Same key signature as F |