Sus2 vs Sus4 Chord Ear Training
Suspended chords remove the third and replace it with either a second (sus2) or fourth (sus4), creating an ambiguous sound that is neither major nor minor. They are everywhere in pop, rock, and ambient music.
What are suspended chords?
A sus2 chord replaces the third with a major second: C-D-G. A sus4 chord replaces the third with a perfect fourth: C-F-G.
Because the third is missing, suspended chords sound ambiguous — neither happy nor sad. They create a sense of anticipation, like a question waiting for an answer.
Sus2 vs Sus4: how they differ
- Sus2: Sounds open, airy, and modern. Think of the shimmery chords in The Police or Mumford & Sons songs.
- Sus4: Sounds more tense and "pulling." It feels like it wants to fall back to the major chord. The classic "resolved sus4" is the backbone of rock guitar.
Both sound distinctly different from major and minor — they lack the emotional certainty that the third provides.
Practice strategy
Suspended chords are best practiced by comparison:
- Start with Major, Sus2, and Sus4 in your answer pool.
- Focus on identifying which chords feel "certain" (major) vs "open" (sus2/sus4).
- Then distinguish sus2 (brighter, wider) from sus4 (more tense, narrower).
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