diff --git a/render.py b/render.py
index 361f8ea..4cd50e3 100644
--- a/render.py
+++ b/render.py
@@ -69,7 +69,9 @@ def write_if_new(path, data, mode=''):
 def format_duration(duration, fps):
     return float('%0.5f' % (round(duration * fps) / fps))
 
-def compose(clips, target=150, base=1024, voice_over=None):
+def compose(clips, target=150, base=1024, voice_over=None, options=None):
+    if options is None:
+        options = {}
     fps = 24
     length = 0
     scene = {
@@ -149,6 +151,18 @@ def compose(clips, target=150, base=1024, voice_over=None):
                 a, b = '-9.5', '-1.50'
             elif 'Melody' in voc['src']:
                 a, b = '-5.25', '-0.25'
+            if options.get('stereo_downmix'):
+                a, b = '-9', '-1'
+                if 'Whispered' in voc['src']:
+                    a, b = '-6', '2'
+                elif 'Read' in voc['src']:
+                    a, b = '-5.75', '2.25'
+                elif 'Free' in voc['src']:
+                    a, b = '-6.8', '3.2'
+                elif 'Ashley' in voc['src']:
+                    a, b = '-7.5', '0.50'
+                elif 'Melody' in voc['src']:
+                    a, b = '-3.25', '1.75'
             voc['filter'] = {'volume': a}
             scene['audio-center']['A1'].append(voc)
             vo_low = vo.copy()
@@ -285,10 +299,13 @@ def compose(clips, target=150, base=1024, voice_over=None):
             blur = seq() * 3
             if blur:
                 scene['back']['V1'][-1]['filter']['blur'] = blur
+        volume_back = '-8.2'
+        if options.get('stereo_downmix'):
+            volume_back = '-6.2'
         scene['audio-back']['A1'].append({
             'duration': clip['duration'],
             'src': clip['original'],
-            'filter': {'volume': '-8.2'},
+            'filter': {'volume': volume_back},
         })
         # TBD: Foley
         cf_volume = '-2.5'
@@ -498,7 +515,13 @@ def render_all(options):
         fragment_clips = fragment['clips']
         unused_fragment_clips = [c for c in fragment_clips if c not in clips_used]
         print('fragment clips', len(fragment_clips), 'unused', len(unused_fragment_clips))
-        scene, used = compose(unused_fragment_clips, target=target, base=fragment_base, voice_over=fragment['voice_over'])
+        scene, used = compose(
+            unused_fragment_clips,
+            target=target,
+            base=fragment_base,
+            voice_over=fragment['voice_over'],
+            options=options
+        )
         clips_used += used
         scene_duration = get_scene_duration(scene)
         print("%s %6.3f -> %6.3f (%6.3f)" % (name, target, scene_duration, fragment_target))