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Music theory basics · updated 2026-08-16

INVERSION

A chord voiced with something other than the root in the bass. First inversion puts the third at the bottom, second inversion the fifth.

Photograph of a printed score of Mozart's Rondo alla Turca open on a music desk, showing staves, key signature and note heads — the written notation this section defines.
Music theory basics — Photograph of a printed score of Mozart's Rondo alla Turca open on a music desk, showing staves, key signature and note heads — the written notation this section defines.

Photo: Music Sheet, Mozart's Alla Turca (opens in a new tab) by Schiller12 (opens in a new tab), via Wikimedia Commons — CC BY-SA 4.0 (opens in a new tab)

Key takeaways

  • A chord voiced with something other than the root in the bass.
  • First inversion puts the third at the bottom, second inversion the fifth.
  • First inversion (third in the bass) lightens a chord, second inversion (fifth in the bass) sounds unstable and wants to move, and inversions are the main tool for creating a bassline that walks while the harmony stays put.
  • C/E in a progression from F to C gives a stepwise bass of F–E–D instead of a jump from F to C.
  • Watch out: ignoring which note is actually lowest in your arrangement.

Quick checklist

  • Can you define inversion in one sentence without looking?
  • Can you point at inversion in a real session, mix or contract?
  • Have you tried the practical move above at least once?
  • Would you catch the common mistake before it costs you a take?
  • Have you opened one of the primary sources below rather than a forum thread?

INVERSION IN DEPTH

An inversion puts a chord tone other than the root in the bass. First inversion (third in the bass) lightens a chord, second inversion (fifth in the bass) sounds unstable and wants to move, and inversions are the main tool for creating a bassline that walks while the harmony stays put.

How it works in practice

C/E in a progression from F to C gives a stepwise bass of F–E–D instead of a jump from F to C.

The mistake people make

Ignoring which note is actually lowest in your arrangement. If the bass instrument plays the root, the keyboard's inversion does not change the chord's function.

WHERE INVERSION SITS

Inversion belongs to music theory basics in the Sampled music glossary. The vocabulary you need before anyone can explain a chart, a chord chart, or a session to you.

TEST YOURSELF

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3 quick questions on inversion. Answers are marked instantly — nothing is sent anywhere.

  1. 1. Which statement best describes inversion?

  2. 2. What is the mistake people most often make with inversion?

  3. 3. In practice, which of these applies to inversion?

Ready for the full thing? Take the 25-question terminology test and get a certificate with your name and score.

SOURCES AND CITATIONS

Free, primary references for inversion — standards bodies, manufacturers, government offices and university course material. Each one lists the line of this entry it backs up.

  • musictheory.net lessons (opens in a new tab)

    Free interactive lessons · musictheory.net

    “A chord voiced with something other than the root in the bass.”— the claim this source supports

    Why it counts: Short interactive drills that let you test the concept immediately rather than only read about it.

  • Open Music Theory (opens in a new tab)

    Open textbook · Open Music Theory

    “First inversion puts the third at the bottom, second inversion the fifth.”— the claim this source supports

    Why it counts: An openly licensed university textbook, so the definition can be checked against a citable academic source.

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