diff --git a/render.py b/render.py
index 9fd0cca..9b44680 100644
--- a/render.py
+++ b/render.py
@@ -264,8 +264,10 @@ def compose(clips, fragment, target=150, base=1024, voice_over=None, options=Non
             voice_overs.append(vo)
             voc = vo.copy()
             a, b = '5', '-1'
-            if options.get('stereo_downmix'):
-                a, b = '5', '-1'
+            #if options.get('stereo_downmix'):
+            #    a, b = '5', '-1'
+            if vo_b:
+                a, b = '3', '-3'
             voc['filter'] = {'volume': a}
             scene['audio-center']['A1'].append(voc)
             vo_low = vo.copy()