While it isn't billed as a compilation, Harmonious Thelonious' second Bureau B release, Instrumentals!: A Collection of Outernational Music Studies, consists of tracks previously issued on EPs by labels like the Trilogy Tapes, Versatile Records, and Disk. The album serves as an excellent primer to Düsseldorf-based producer Stefan Schwander's intriguing project, which constructs post-industrial rhythmic loops and adds hypnotic instrumentation inspired by Middle Eastern and African traditions. He typically avoids the types of heavy kick drums that would push his sound into banger territory, but his tracks are nevertheless filled with strong, insistent rhythms, and he explores the space within this framework. There are shades of deep house in mellower tracks like "Beiläufige Muziek" and "Some Blue Beats," while others such as "Halb Ding" and "Apakapa" are more rambunctious desert techno excursions.