Håkon Kornstad Tenor Battle

Around midnight Monday Håkon Kornstad Tenor Battle played in the Korskirken church at the Nattjazz festival in Bergen.

Kornstad, both a veteran sax player and a first year opera student, has started to mix jazz and opera, with his new band Tenor Battle.
In jazz a "tenor battle" is a more or less friendly "fight" between to sax players, but I guess here it´s the sax player and the singer who fight (?) each other?

The band fit Kornstad in a perfect way, with Sigbjørn Apeland (introduced as the saviour of the harmonium), Per Zanussi (great bass and saw player) and Øyvind Skarbø (both discreetly adding color to the band sound, and throwing flashy backhand strokes to the floor).

A truly great evening in church!

I haven´t got the faintest idea what opera Kornstad is singing from here. Anyone else? Zanussi had just finished a saw solo when the video starts, but I guess sawing was not an issue in the original opera?