 Through the 1960s , although he taught and lectured publicly ( Stockhausen Texte , 3 : 196 – 211 ) , Stockhausen published little of an analytical or theoretical nature . Only in 1970 did he again begin publishing theoretical articles , with " Kriterien " , the abstract for his six seminar lectures for the Darmstädter Ferienkurse ( Stockhausen ' Texte , 3 : 222 – 29 ) . The seminars themselves , covering seven topics ( " Micro- and Macro @-@ Continuum " , " Collage and Metacollage " , " Expansion of the Scale of Tempos " , " Feedback " , " Spectral Harmony — Formant Modulation " , " Expansion of Dynamics — A Principle of Mikrophonie I " , and " Space Music — Spatial Forming and Notation " ) were published only posthumously ( Stockhausen 2009 ) . 
