Sometimes the reviewer is expected to be a know-it-all; a person of impeccable taste. I like to think I am not that person. There is massive blank space here when it comes to composers, genres, musicians and such like. I know lots of people think the world of the music of Maryanne Amacher (1938-2009), but I am afraid I am one of those people who still have to hear anything by her properly. Well, of course, I heard ‘Petra’ now, the CD in front of me, which I have to review. Based on my very limited knowledge I had expected some electronic piece, but ‘Petra’ is a work for two pianos and premiered in 1991. Amacher was back then one of the two players, and the other was Marianne Schroeder, who is also playing it here, in this 2017 recording, with Stefan Tcherepnin.