When looking at the magnitude of music composed by Yuzo Koshiro for the Etrian Odyssey series of role-playing games, its breadth amounts to a small kingdom of sounds. The original soundtracks for the first two titles make up five discs. In addition, a drama CD, two Super Arrange records, a piano collection and an album of arrangements on live piano and strings have also been published.
During this year's EXTRA Hyper Game Music Event in Shin-Kiba, Japan, Koshiro joined arranger Norihiko Hibino to perform several tracks from the Etrian Odyssey series on keyboard. In this interview with Siliconera following the live concert, the composer discusses the making of the series' music and the approach underlying the nostalgic fantasy atmosphere of the Nintendo DS RPG series.