SprachSchlag is a rhythmic interplay between the instrumental part and electroacoustic sounds. All rhythms are derived from the analysis of speech in various languages. The primary instruments are percussive skins (bass drum, tom-tom) and vibraphone, accompanied by metal sounds such as tamtam, Peking gongs, and crotales.
The electroacoustic sounds result from live processing of the percussion sequences along with pre-prepared sound files composed from voice and percussion sources.
The electroacoustic component extends the gestures of the percussionist. The computer analyzes the dynamics of the live performance to set numerous parameters for this part, meaning the percussionist indirectly controls aspects of the playback within a given "Event" (see the technical notes "how the electroacoustic part works" for details).
Even though the live-electronic section is influenced by the instrumentalist's playing style, the performance requires a second musician who advances the events and manages the amplification and mix. This musician must be familiar with the percussion score to effectively accompany the instrumentalist.