anchor.diff:     #:stop-backend
      #:enabled-backends
   
  +   ;;; render.lisp
  +
  +   #:*cl-patterns-temporary-directory*
  +   #:render
  +
      ;;; clock.lisp
   
      #:task-pattern
  
positive.code:   (:export
  
     ;;; utility.lisp
  
     #:*cl-patterns-temporary-directory*
  
     #:*event*
     #:*clock*
  
negative.code:    #:all-instruments
     #:playing-nodes
  
     ;;; conversions.lisp
  
     #:bipolar-unipolar
  