hi Janosch, > But fluxus doesent know the function "asdr". I greped thru the complete it's adsr, not asdr. you can find the details in the inline help of fluxus. type (help "fluxa") in the repl. or read it in the file modules/scheme/fluxa.ss, or online in the git repo: http://git.savannah.gnu.org/cgit/fluxus.git/tree/modules/scheme/fluxa.ss best, gabor