diff --git a/software/o_c_REV/APP_BIGSCOPE.ino b/software/o_c_REV/APP_BIGSCOPE.ino
new file mode 100644
index 000000000..08d77659e
--- /dev/null
+++ b/software/o_c_REV/APP_BIGSCOPE.ino
@@ -0,0 +1,225 @@
+#include "HSApplication.h"
+#include "HSMIDI.h"
+
+#define HEMISPHERE_MAX_CV 7680
+#define HEMISPHERE_CENTER_CV 0
+#define SCOPE_WIDTH 128
+
+class BigScope : public HSApplication, public SystemExclusiveHandler {
+public:
+    void Start() {
+        last_bpm_tick = OC::CORE::ticks;
+        bpm = 0;
+        sample_ticks = 320;
+        freeze = 0;
+        last_scope_tick = 0;
+    }
+
+    void Resume() {
+    }
+
+    void Controller() {
+        if (Clock(0)) {
+            int this_tick = OC::CORE::ticks;
+            int time = this_tick - last_bpm_tick;
+            last_bpm_tick = this_tick;
+            bpm = 1000000 / time;
+            if (bpm > 9999) bpm = 9999;
+
+            if (last_scope_tick) {
+                int cycle_ticks = OC::CORE::ticks - last_scope_tick;
+                sample_ticks = cycle_ticks / 64;
+                sample_ticks = constrain(sample_ticks, 2, 64000);
+            }
+            last_scope_tick = OC::CORE::ticks;
+        }
+
+        if (!freeze) {
+            last_cv = In(0);
+
+            if (--sample_countdown < 1) {
+                sample_countdown = sample_ticks;
+                if (++sample_num > 127) sample_num = 0;
+                int sample = Proportion(In(0), HEMISPHERE_MAX_CV, 128);
+                sample = constrain(sample, -128, 127) + 127;
+                snapshot[sample_num] = (uint8_t) sample;
+            }
+
+            Out(0, In(0));
+        }
+    }
+
+    void View() {
+        gfxHeader("Scope");
+        //gfxPrint(1, 2, "Scope");
+        //DrawTicks();
+        DrawVoltage();
+        DrawBPM();
+        DrawInput1();
+        if (freeze) {
+            gfxInvert(0, 24, 128, 40);
+        }
+    }
+
+    void OnSendSysEx() {
+    }
+
+    void OnReceiveSysEx() {
+    }
+
+    /////////////////////////////////////////////////////////////////
+    // Control handlers
+    /////////////////////////////////////////////////////////////////
+    void OnLeftButtonPress() {
+        freeze = 1 - freeze;
+    }
+
+    void OnLeftButtonLongPress() {
+
+    }
+
+    void OnRightButtonPress() {
+    }
+
+    void OnUpButtonPress() {
+    }
+
+    void OnDownButtonPress() {
+    }
+
+    void OnDownButtonLongPress() {
+    }
+
+    void OnLeftEncoderMove(int direction) {
+        if (sample_ticks < 32) sample_ticks += direction;
+        else sample_ticks += direction * 10;
+        sample_ticks = constrain(sample_ticks, 2, 64000);
+        last_encoder_move = OC::CORE::ticks;
+    }
+
+    void OnRightEncoderMove(int direction) {
+    }
+
+private:
+    // BPM Calcultion
+    int last_bpm_tick;
+    int bpm;
+
+    // CV monitor
+    int last_cv;
+    bool freeze;
+
+    // Scope
+    uint8_t snapshot[128];
+    int sample_ticks; // Ticks between samples
+    int sample_countdown; // Last time a sample was taken
+    int sample_num; // Current sample number at the start
+    int last_encoder_move; // The last the the sample_ticks value was changed
+    int last_scope_tick; // Used to auto-calculate sample countdown
+
+    void DrawBPM() {
+        gfxPrint(110, 1, bpm / 4);
+        gfxBitmap(102, 1, 8, CLOCK_ICON);
+    }
+
+//    void DrawTicks() {
+//        gfxPrint(40, 1, sample_ticks);
+//    }
+
+
+    void gfxPrintVoltage(int cv) {
+        int v = (cv * 100) / (12 << 7);
+        bool neg = v < 0 ? 1 : 0;
+        if (v < 0) v = -v;
+        int wv = v / 100; // whole volts
+        int dv = v - (wv * 100); // decimal
+        gfxPrint(neg ? "-" : "+");
+        gfxPrint(wv);
+        gfxPrint(".");
+        if (dv < 10) gfxPrint("0");
+        gfxPrint(dv);
+        gfxPrint("V");
+    }
+
+    void DrawVoltage() {
+        gfxBitmap(45, 3, 8, CV_ICON);
+        gfxPos(55, 1);
+        gfxPrintVoltage(last_cv);
+    }
+
+    void DrawInput1() {
+        for (int s = 0; s < 128; s++)
+        {
+            int x = s + sample_num;
+            if (x > 127) x -= 128;
+            int l = Proportion(snapshot[x], 255, 48);
+            gfxPixel(x, (48 - l) + 14);
+        }
+
+    }
+
+};
+
+BigScope BigScope_instance;
+
+// App stubs
+void BigScope_init() {
+    BigScope_instance.BaseStart();
+}
+
+// Not using O_C Storage
+size_t BigScope_storageSize() { return 0; }
+
+size_t BigScope_save(void *storage) { return 0; }
+
+size_t BigScope_restore(const void *storage) { return 0; }
+
+void BigScope_isr() {
+    return BigScope_instance.BaseController();
+}
+
+void BigScope_handleAppEvent(OC::AppEvent event) {
+    if (event == OC::APP_EVENT_RESUME) {
+        BigScope_instance.Resume();
+    }
+    if (event == OC::APP_EVENT_SUSPEND) {
+        BigScope_instance.OnSendSysEx();
+    }
+}
+
+void BigScope_loop() {} // Deprecated
+
+void BigScope_menu() {
+    BigScope_instance.BaseView();
+}
+
+void BigScope_screensaver() {} // Deprecated
+
+void BigScope_handleButtonEvent(const UI::Event &event) {
+    // For left encoder, handle press and long press
+    if (event.control == OC::CONTROL_BUTTON_L) {
+        if (event.type == UI::EVENT_BUTTON_LONG_PRESS) BigScope_instance.OnLeftButtonLongPress();
+        else BigScope_instance.OnLeftButtonPress();
+    }
+
+    // For right encoder, only handle press (long press is reserved)
+    if (event.control == OC::CONTROL_BUTTON_R && event.type == UI::EVENT_BUTTON_PRESS)
+        BigScope_instance.OnRightButtonPress();
+
+    // For up button, handle only press (long press is reserved)
+    if (event.control == OC::CONTROL_BUTTON_UP) BigScope_instance.OnUpButtonPress();
+
+    // For down button, handle press and long press
+    if (event.control == OC::CONTROL_BUTTON_DOWN) {
+        if (event.type == UI::EVENT_BUTTON_PRESS) BigScope_instance.OnDownButtonPress();
+        if (event.type == UI::EVENT_BUTTON_LONG_PRESS) BigScope_instance.OnDownButtonLongPress();
+    }
+}
+
+void BigScope_handleEncoderEvent(const UI::Event &event) {
+    // Left encoder turned
+    if (event.control == OC::CONTROL_ENCODER_L) BigScope_instance.OnLeftEncoderMove(event.value);
+
+    // Right encoder turned
+    if (event.control == OC::CONTROL_ENCODER_R) BigScope_instance.OnRightEncoderMove(event.value);
+}
diff --git a/software/o_c_REV/OC_apps.ino b/software/o_c_REV/OC_apps.ino
index e4093e2ce..52306f475 100644
--- a/software/o_c_REV/OC_apps.ino
+++ b/software/o_c_REV/OC_apps.ino
@@ -38,6 +38,7 @@ OC::App available_apps[] = {
   DECLARE_APP('H','S', "Hemisphere", HEMISPHERE),
   DECLARE_APP('M','I', "Captain MIDI", MIDI),
   DECLARE_APP('D','2', "Darkest Timeline", TheDarkestTimeline),
+  DECLARE_APP('B','S', "Scope", BigScope),
   DECLARE_APP('E','N', "Enigma", EnigmaTMWS),
   DECLARE_APP('N','N', "Neural Net", NeuralNetwork),
   DECLARE_APP('S','C', "Scale Editor", SCALEEDITOR),