Chord Inversions

An inversion is the same three notes with a different one at the bottom. The bass is the lowest note you hear; the root is still the note the chord is named after.

C major · Root position (C – E – G)

The bass is tagged BASS. The purple 1 badge identifies the chord root, even when it is not the lowest note.

Bass (lowest): C4; the root of C major
Chord root: C; also the bass

Low → highC₄ root · 1E₄ 3rd · 3G₄ 5th · 5

Root → 1st → 2nd: each time the lowest note jumps up an octave. One more move would give root position again, an octave higher.