Which preposition to use with humana

in Occurrences 3%

Errat et illinc Huc venit, hinc illuc, et quoslibet occupat artus Spiritus: éque feris humana in corpora transit, Inque feras noster Pythag.

of Occurrences 3%

The Jew's harp has three different tones; the bass tones of the first octave bear some resemblance to those of the flute and clarionet; those of the middle and high, to the vox humana of some organs; lastly, the harmonical sounds are exactly like those of the harmonica.

Which preposition to use with  humana