diff --git a/bin/curvecalc b/bin/curvecalc
--- a/bin/curvecalc
+++ b/bin/curvecalc
@@ -64,7 +64,7 @@ class Main(object):
 
         mainwin.connect("delete-event", lambda *args: reactor.crash())
         mainwin.set_title("curvecalc - %s" % graph.label(song))
-        mainwin.parse_geometry("715x930-0+24")
+        mainwin.parse_geometry("1x1-0+0")
 
         # this is the only one i found that would set the size right,
         # but it's a minimum size, which i don't really want
diff --git a/light9/io/__init__.py b/light9/io/__init__.py
--- a/light9/io/__init__.py
+++ b/light9/io/__init__.py
@@ -65,7 +65,7 @@ class UsbDMX(BaseIO):
         if self.out is None:
             sys.path.append("dmx_usb_module")
             from dmx import Dmx
-            self.out = Dmx('/dev/dmx1')
+            self.out = Dmx('/dev/dmx0')
         return self.out