diff --git a/megra-event-base.lisp b/megra-event-base.lisp
index 4fc79cc..24764c6 100644
--- a/megra-event-base.lisp
+++ b/megra-event-base.lisp
@@ -254,7 +254,10 @@
 			 ',parent-keyword-parameter-names
 			 ',(mapcar #'cadr parent-keyword-parameters))
 		 (print-tags (event-tags evt))
-		 (print-combi-fun (value-combine-function evt))))))))
+		 (print-combi-fun (value-combine-function evt)))))
+       ;; define event predicate for filters
+       (defun ,(read-from-string (concatenate 'string (symbol-name short-name) "-" (symbol-name 'p))) (event)
+	 (typep event ',class-name )))))
 ;; end event definition macro ...
 
 ;; another macro if you want to make an event available under a different
diff --git a/megra-event-filters.lisp b/megra-event-filters.lisp
index 9f356dd..69b3f08 100644
--- a/megra-event-filters.lisp
+++ b/megra-event-filters.lisp
@@ -3,17 +3,10 @@
 ;; some default event filters
 (defmethod all-p ((e event) &key) t)
 
-(defmethod transition-p ((e event) &key)
-  (typep e 'transition))
-
 (defun snare-p (event)
   (or (member 'snare (event-tags event))
       (member 'sn (event-tags event))))
 
-(defun bd-p (event)
-  (or (member 'bassdrum (event-tags event))
-      (member 'bd (event-tags event))))
-
 (defun ride-p (event)
   (member 'ride (event-tags event)))
 
diff --git a/megra-playground.megra b/megra-playground.megra
index 48ea38b..370d79f 100644
--- a/megra-playground.megra
+++ b/megra-playground.megra
@@ -8,11 +8,13 @@
 
 (clear)
 
+(typep (saw 100) 'saw-event)
+
 (pring 'bass4 t)
 
 (event-source (growth 'bass4 0.3))
 
-x(pull-events (gethash 'bass-2 *chain-directory*))
+(pull-events (gethash 'bass-2 *chain-directory*))
 
 (handle-events  0)
 
@@ -26,17 +28,16 @@ x(pull-events (gethash 'bass-2 *chain-directory*))
 
 (global-resources 30)
 
-(chain 'bass-2 ()
-  (exh 100 sn)
-  (cc 80 (lvl 0.0) :f #'sn-p)
-  (lim 'lvl 0.3 0.4)
-  (lmctrl 0.4 'loop 15 :lifespan 18)
-  ;;(probctrl 0.7 11 10 'triloop)
+(s 'bass-2 ()
+  (inh 50 sn)
+  (inh 50 bd)
+  ;;(lmctrl 0.4 'loop 15 :lifespan 18)
+  (probctrl 0.1 11 10 'triloop)
   (nuc 'bass4 
        (list
-	(bd '|909| :lp-dist 1.0)
-	(sn '|78| :rev 0.01)
-	(saw 100 :dur 70 :rel 60 :lp-dist 1.0 :lp-freq 500))
+	(bd '|909| :lp-dist 0.0 :lvp 0.3)
+	(sn '|78| :rev 0.01 :lvl 0.3)
+	(saw 100 :dur 70 :rel 60 :lp-dist 1.0 :lp-freq 500 :lvl 0.3))
        :gap 100 :reset t))
 
 (s 'hat (:sync-to 'bass-2)