diff --git a/samples/drumthumper/src/main/res/layout-land/drumthumper_activity.xml b/samples/drumthumper/src/main/res/layout-land/drumthumper_activity.xml
index ea0a665..bcc7a49 100644
--- a/samples/drumthumper/src/main/res/layout-land/drumthumper_activity.xml
+++ b/samples/drumthumper/src/main/res/layout-land/drumthumper_activity.xml
@@ -13,44 +13,249 @@
         android:layout_height="wrap_content"
         android:gravity="center"
         android:text="DrumThumper"
-        android:textSize="22pt" />
+        android:textSize="14pt" />
 
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="128dp"
         android:orientation="horizontal">
 
-        <com.google.oboe.sample.drumthumper.TriggerPad
-            android:id="@+id/kickPad"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:padding="5dp"
-            android:text="Kick" />
-
-        <com.google.oboe.sample.drumthumper.TriggerPad
-            android:id="@+id/snarePad"
+        <LinearLayout
             android:layout_width="wrap_content"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:padding="5dp"
-            android:text="Snare" />
+            android:layout_height="128dp"
+            android:layout_weight=".5"
+            android:orientation="vertical">
 
-        <com.google.oboe.sample.drumthumper.TriggerPad
-            android:id="@+id/midTomPad"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:padding="5dp"
-            android:text="Mid Tom" />
+            <com.google.oboe.sample.drumthumper.TriggerPad
+                android:id="@+id/kickPad"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:padding="5dp"
+                android:text="Kick" />
 
-        <com.google.oboe.sample.drumthumper.TriggerPad
-            android:id="@+id/lowTomPad"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:padding="5dp"
-            android:text="Low Tom" />
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:id="@+id/kickMixControls">
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="P:"/>
+
+                    <SeekBar
+                        android:id="@+id/kickPan"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="G:"/>
+
+                    <SeekBar
+                        android:id="@+id/kickGain"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+            </LinearLayout>
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="128dp"
+            android:layout_weight=".5"
+            android:orientation="vertical">
+
+            <com.google.oboe.sample.drumthumper.TriggerPad
+                android:id="@+id/snarePad"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:padding="5dp"
+                android:text="Snare" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:id="@+id/snareMixControls">
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="P:"/>
+
+                    <SeekBar
+                        android:id="@+id/snarePan"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="G:"/>
+
+                    <SeekBar
+                        android:id="@+id/snareGain"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+
+                </LinearLayout>
+            </LinearLayout>
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="128dp"
+            android:layout_weight=".5"
+            android:orientation="vertical">
+
+            <com.google.oboe.sample.drumthumper.TriggerPad
+                android:id="@+id/hihatOpenPad"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:padding="5dp"
+                android:text="Open Hat" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:id="@+id/hihatOpenMixControls">
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="P:"/>
+
+                    <SeekBar
+                        android:id="@+id/hihatOpenPan"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="G:"/>
+
+                    <SeekBar
+                        android:id="@+id/hihatOpenGain"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+            </LinearLayout>
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="128dp"
+            android:layout_weight=".5"
+            android:orientation="vertical">
+
+            <com.google.oboe.sample.drumthumper.TriggerPad
+                android:id="@+id/hihatClosedPad"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:padding="5dp"
+                android:text="Closed Hat" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:id="@+id/hihatClosedMixControls">
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="P:"/>
+
+                    <SeekBar
+                        android:id="@+id/hihatClosedPan"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="G:"/>
+
+                    <SeekBar
+                        android:id="@+id/hihatClosedGain"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+            </LinearLayout>
+        </LinearLayout>
     </LinearLayout>
 
     <LinearLayout
@@ -58,38 +263,245 @@
         android:layout_height="128dp"
         android:orientation="horizontal">
 
-        <com.google.oboe.sample.drumthumper.TriggerPad
-            android:id="@+id/hihatOpenPad"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:padding="5dp"
-            android:text="Open Hat" />
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="128dp"
+            android:layout_weight=".5"
+            android:orientation="vertical">
 
-        <com.google.oboe.sample.drumthumper.TriggerPad
-            android:id="@+id/hihatClosedPad"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:padding="5dp"
-            android:text="Closed Hat" />
+            <com.google.oboe.sample.drumthumper.TriggerPad
+                android:id="@+id/midTomPad"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:padding="5dp"
+                android:text="Mid Tom" />
 
-        <com.google.oboe.sample.drumthumper.TriggerPad
-            android:id="@+id/ridePad"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:padding="5dp"
-            android:text="Ride" />
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:id="@+id/midTomMixControls">
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
 
-        <com.google.oboe.sample.drumthumper.TriggerPad
-            android:id="@+id/crashPad"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:padding="5dp"
-            android:text="Crash" />
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="P:"/>
+
+                    <SeekBar
+                        android:id="@+id/midTomPan"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="G:"/>
+
+                    <SeekBar
+                        android:id="@+id/midTomGain"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+            </LinearLayout>
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="128dp"
+            android:layout_weight=".5"
+            android:orientation="vertical">
+
+            <com.google.oboe.sample.drumthumper.TriggerPad
+                android:id="@+id/lowTomPad"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:padding="5dp"
+                android:text="Low Tom" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:id="@+id/lowTomMixControls">
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="P:"/>
+
+                    <SeekBar
+                        android:id="@+id/lowTomPan"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="G:"/>
+
+                    <SeekBar
+                        android:id="@+id/lowTomGain"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+            </LinearLayout>
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="128dp"
+            android:layout_weight=".5"
+            android:orientation="vertical">
+
+            <com.google.oboe.sample.drumthumper.TriggerPad
+                android:id="@+id/ridePad"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:padding="5dp"
+                android:text="Ride" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:id="@+id/rideMixControls">
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="P:"/>
+
+                    <SeekBar
+                        android:id="@+id/ridePan"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="G:"/>
+
+                    <SeekBar
+                        android:id="@+id/rideGain"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+            </LinearLayout>
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="128dp"
+            android:layout_weight=".5"
+            android:orientation="vertical">
+
+            <com.google.oboe.sample.drumthumper.TriggerPad
+                android:id="@+id/crashPad"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:padding="5dp"
+                android:text="Crash" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:id="@+id/crashMixControls">
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="P:"/>
+
+                    <SeekBar
+                        android:id="@+id/crashPan"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="G:"/>
+
+                    <SeekBar
+                        android:id="@+id/crashGain"
+                        style="@android:style/Widget.DeviceDefault.SeekBar"
+                        android:layout_width="match_parent"
+                        android:layout_height="20dp"
+                        android:layout_marginTop="5dp"
+                        android:max="200" />
+                </LinearLayout>
+            </LinearLayout>
+        </LinearLayout>
     </LinearLayout>
-
-
+    <Button
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Hide/Show Mix Controls"
+        android:id="@+id/mixCtrlBtn"/>
 </LinearLayout>