theremin duet: Va' pensiero (Nabucco)

Verdi, Va' pensiero (Nabucco) DUO played by the theremin player Maurizio Vento on the Pegna vacuum tube theremin.
In this video TWO different sounds of the Pegna vacuum tube theremin are combined together in order to simulate a DUET with a tenor and a soprano.
The shape of the sound, finely adjusted by Maurizio Vento in the theremin, emulates the voice of a tenor and the voice of a soprano; the sound is unprocessed, if not for a bit of reverb coming from the effect section of the amplifier, a Behringer K450FX.
Accompaniment provided by: www.pianoaccompanists.com