Short Answer
Overview
A suspended chord is a triadic harmony in which the third— the note that determines whether the chord is major or minor— is replaced by either a second (sus2) or a fourth (sus4). This substitution removes the chord’s tonal definiteness, creating an open, unresolved sonority that typically resolves back to a conventional major or minor triad. Suspended chords are written with the abbreviation “sus” followed by the number of the replaced scale degree, for example, C sus2 or G sus4.
History / Origin
The practice of suspending the third dates back to medieval and Renaissance music, where composers used “suspensions” as a voice‑leading technique. The modern chord symbol “sus” emerged in the 19th century, especially within French and German harmonic theory, and became commonplace in popular music during the mid‑20th century as composers sought more ambiguous harmonic colors.
How It’s Used
Suspended chords appear in many genres, from classical cadential formulas to rock, pop, jazz, and folk. Guitarists often employ sus4 shapes to add tension before a resolution, while pianists may use sus2 chords for a more delicate, airy texture. In notation the chord is indicated by the root note, the “sus” symbol, and the number (2 or 4), sometimes followed by an added seventh (e.g., D sus2 7).
Why It Matters
For musicians, suspended chords provide a simple way to colour a progression without altering its fundamental function. Listeners recognize the characteristic “suspended” feeling, which is used in countless hits such as The Beatles’ “We Can Work It Out” (E sus4 – E), Radiohead’s “Creep” (G sus4 – G), and many jazz standards where sus chords lead to strong resolutions.
Common Misconceptions
Suspended chords are sometimes confused with other non‑triadic structures.
- Misconception: A sus2 chord is the same as an added‑9 chord.
Correction: An added‑9 retains the third, while a sus2 replaces the third with the second. - Misconception: Sus chords are always unresolved.
Correction: They usually resolve to a major or minor triad, but can be used as stable harmony in certain modal contexts.
FAQ
What is the difference between sus2 and sus4?
In a sus2 chord the third is replaced by the second scale degree, while in a sus4 chord the third is replaced by the fourth. The resulting sonorities are distinct, with sus4 generally sounding more tense.
Can a suspended chord be used without resolving?
Yes. In modal or ambient music a sus chord may function as a stable harmony, especially when the surrounding context does not imply a traditional tonic resolution.
How is a suspended chord notated for guitar?
Guitarists often use standard chord‑shape symbols such as ‘Xsus4’ or write the full root and sus designation (e.g., ‘C sus4’). Many chord‑books provide specific fingerings for common sus chords.
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