diff --git a/resources/library/effects/solitaire.glsl b/resources/library/effects/solitaire.glsl
index 57c2e5c8..329bd456 100644
--- a/resources/library/effects/solitaire.glsl
+++ b/resources/library/effects/solitaire.glsl
@@ -7,7 +7,7 @@ void main(void) {
 
     // Closed-form bouncing behavior
     // I think this is periodic over [0.0, 16.] to prevent discontinuities
-    vec2 xy = vec2(sawtooth(iStep * 0.325, 0.5), 1.0 - abs(sin(iStep * M_PI * 0.5625)));
+    vec2 xy = vec2(sawtooth(iStep * 0.3125, 0.5), 1.0 - abs(sin(iStep * M_PI * 0.5625)));
 
     xy = (xy - 0.5) * (1.0 - scale);
     vec2 uvSample = (uv - 0.5 + xy) / scale + 0.5;
diff --git a/resources/library/effects/tunnel.glsl b/resources/library/effects/tunnel.glsl
index 0b1cf5fb..27385b93 100644
--- a/resources/library/effects/tunnel.glsl
+++ b/resources/library/effects/tunnel.glsl
@@ -5,7 +5,7 @@ void main()
 {
 	vec2 q = (uv - vec2(0.5, 0.5)) * aspectCorrection;
 
-    float t2 = iTime * 0.2;
+    float t2 = iTime * (M_PI / 16.);
     vec2 offset = vec2(sin(t2), cos(t2)) * 0.2;
     q -= offset;
 
diff --git a/resources/qml/MidiMappings/SamsonGraphiteMF8.qml b/resources/qml/MidiMappings/SamsonGraphiteMF8.qml
new file mode 100644
index 00000000..222fce14
--- /dev/null
+++ b/resources/qml/MidiMappings/SamsonGraphiteMF8.qml
@@ -0,0 +1,54 @@
+import QtQuick 2.3
+import radiance 1.0
+
+QtObject {
+    property variant target;
+
+    property variant lpfTimer: Timer {
+        interval: 50; running: true; repeat: true
+        onTriggered: mc.scrollAccumulator *= 0.9;
+    }
+
+    property variant mc: MidiController {
+        id: controller
+        deviceName: "SAMSON Graphite MF8"
+
+        property real scrollAccumulator;
+
+        onConnectedChanged: {
+            console.log(deviceName + " " + (connected ? "connected" : "disconnected"));
+        }
+
+        onNoteOn: {
+            console.log("on ", channel, note, velocity);
+        }
+
+        onNoteOff: {
+            console.log("off", channel, note, velocity);
+        }
+
+        onControlChange: {
+            console.log("cc ", channel, control, value, 123);
+            if (control == 60) { // "A" jogwheel
+                var N = 4;
+                var v = value;
+                if (v > 64) {
+                    v = 64 - v;
+                }
+                v /= Math.sqrt(Math.abs(v));
+
+                scrollAccumulator += v;
+                if (scrollAccumulator > N / 2) {
+                    target.Controls.changeControlRel(0, Controls.Scroll, 1);
+                    scrollAccumulator -= N;
+                } else if (scrollAccumulator <= -N / 2) {
+                    target.Controls.changeControlRel(0, Controls.Scroll, -1);
+                    scrollAccumulator += N;
+                }
+            } else if (control == 49) { // "B" jogwheel
+                var v = value << 25 >> 25;
+                target.Controls.changeControlRel(0, Controls.PrimaryParameter, v / 127);
+            }
+        }
+    }
+}