diff --git a/bin/curvecalc b/bin/curvecalc
--- a/bin/curvecalc
+++ b/bin/curvecalc
@@ -42,6 +42,9 @@ class Music:
             pass#self.player=None
         d.addCallback(sendtime)
         return d
+    
+    def seekplay_or_pause(self,t):
+        self.player.callRemote('seekplay_or_pause',t)
         
 class Subexpr:
     curveset = None
@@ -241,6 +244,7 @@ except IndexError:
     raise SystemExit("song name is required, e.g. '05-mix'")
 
 music=Music()
+dispatcher.connect(lambda t: music.seekplay_or_pause(t),"music seek")
 
 zc = Zoomcontrol(root)
 zc.pack(side='top',fill='x')
@@ -286,7 +290,7 @@ def savekey(*args):
 root.bind("<Control-Key-s>",savekey)
 
 create_status_lines(root)
-for helpline in ["Bindings: C-s save subterms; B1 drag point; C-B1 curve add point; 1..5 add point at time; Esc see current time; Mousewheel zoom",
+for helpline in ["Bindings: C-s save subterms; B1 drag point; C-B1 curve add point; 1..5 add point at time; Esc see current time; S-Esc see curtime to end; Mousewheel zoom; C-p play/pause music at mouse",
                  "Available in functions: nsin/ncos period=amp=1; within(a,b) bef(x) aft(x) compare to time; smoove(x) cubic smoothstep; curvename(t) eval curve"]:
     tk.Label(root,text=helpline, font="Helvetica -12 italic",
              anchor='w').pack(side='top',fill='x')