'Brando detto Alta Regina' is a Renaissance dance tune from 'le Gratie d'Amore' (1602) by Cesare Negri (ca. 1535-ca. 1605).
Played by Constance Allanic on a Renaissance harp made by Claus Henry Hüttel, after an Italian original from the Kunsthistorisches Museum in Vienna.
The buzzing ('braying' is the official term, yes, like a donkey...) sound is caused by the wooden 'bray-pins' which secure the pin in the soundboard and just touch the string, creating exactly that sound which harpists nowadays try to avoid. Because this harp has just one row of strings and no pedals or levers, the semitones are made by fretting them on the neck of the harp with the left hand (and plucking with the right hand).
No, I didn't buy yet another harp... Claus lent me this instrument for a concert and I took the opportunity to make this recording in September 2015.