Here is the program notes that I wrote on this piece.
Piano Concerto in c minor, “Dies Irae” (2007-2008)
“Dies Irae” means “Day of Wrath” in which represented in the "End Of Time:. This piano concerto mirrors the chaotic atmosphere on the judgment day. As can be heard the army of hell marching onto the earth to collect the damned souls, the scorching hellfire that burn everything standing in their way, and cries of fear and despair of the accursed souls are projected through the ironically lamenting melody in the middle section. How they are trembling of what awaits them as their price of a depraved life. The dramatic atmosphere--fear of hell’s wrath--is spread through the entire piece. Although there are still victorious cheers from the redeemed souls for their battle on the earth is over and they have triumph over hell. Cheer of salvation.
The gigantic size of the orchestra magnitudes a very strong atmosphere. Not to mention the unusual use of choir in a piano concerto to thicken the “haunting” atmosphere. The incredibly long cadenza indicates the heavy loads the soloist holds. Designed solely for the purpose of showing off the pianist musically and technically, Andreas creates the orchestra accompaniment as supportive as possible, enabling the pianist to explore much more virtuoso figures. The pianist is required a great amount of imagination and mental strength to produce an atmosphere of such magnitude along with the stamina and energy needed to master the technical difficulties and produce a very strong sound to keep up with the large sound of the orchestra and choir accompaniment.