Hi After getting to know with cm, i tried to use it under linux and gcl, but the build crashes in utils2.lisp in setf-find-object line: setf (slot-value element 'id) id), that SETF form can't be expanded. CLisp and dos version works fine. The source is cm.tar.gz from ccrma. Another question. Is it hard to put midi-output also in linux? Next code might be as an example. Any help appreciated. - Matti