 The movement endorsed the so-called "Werkprinzip", in which each division of the instrument's pipework was based on a principal-scale rank of a different octave.Organ voicers strove for an articulate pipe speech characterized by a short burst of "chiff" sound at the start of each note, and avoided "nicking" the pipe edges and other techniques of achieving symphonic-style "smoothness".Low wind pressures were revived.