Voicing of F Minor Triad

1st Inversion

Back to Fm

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Left hand
Ab2C3F3
Family
Triads

The 1st Inversion voicing of Fm stacks Ab, C and F from the bottom up: the minor 3rd, 5th and root of the chord.

It's one of the Triads voicings. The others for Fm are Root Inversion, 2nd Inversion and Doubled Root.