diff --git a/src/main.cpp b/src/main.cpp
index 56c4cc7..b5310a1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -21,6 +21,8 @@ UsbMidiTransport midi_transport;
 AppTask controller(&led_driver, &switch_driver, &midi_transport);
 ExpressionPedal exp_pedal(4);
 
+static volatile uint32_t flash_latency = 20; // ms delay to compensate for Loopy Pro rendering
+
 TaskHandle_t midi_task_handle = NULL;
 
 void midi_task(void* parameter) {
@@ -29,7 +31,6 @@ void midi_task(void* parameter) {
     // Beat timing fixes for precise beat alignment - sync to real MIDI time, not hardcoded tempo
     uint32_t last_beat = 0;
     uint32_t flash_start = 0;
-    const uint32_t FLASH_LATENCY = 20; // ms delay to compensate for audio buffer
 
     while (true) {
         midi_transport.update();
@@ -42,7 +43,7 @@ void midi_task(void* parameter) {
 
         if (current_beat != last_beat) {
             last_beat = current_beat;
-            flash_start = now + FLASH_LATENCY;
+            flash_start = now + flash_latency;
             // Beat 1 (every 4th) = RED, others = WHITE
             if (current_beat % 4 == 0) {
                 mux.set_led_color(6, 255, 0, 0);
@@ -122,6 +123,16 @@ void handle_serial_command(const String& cmd) {
     } else if (cmd == "exp") {
         Serial.printf("[CMD] EXP ADC=%d MIDI=%d\n",
                       exp_pedal.get_raw(), exp_pedal.get_value());
+    } else if (cmd == "latency") {
+        Serial.printf("[CMD] Current flash latency: %d ms\n", flash_latency);
+    } else if (cmd.startsWith("latency ")) {
+        int val = atoi(cmd.c_str() + 8);
+        if (val >= 0 && val <= 500) {
+            flash_latency = val;
+            Serial.printf("[CMD] Flash latency set to %d ms\n", flash_latency);
+        } else {
+            Serial.println("[CMD] Latency must be 0-500 ms");
+        }
     } else if (cmd == "usb") {
         Serial.printf("[CMD] USB mounted: %s\n", TinyUSBDevice.mounted() ? "YES" : "NO");
         Serial.printf("[CMD] USB ready: %s\n", TinyUSBDevice.ready() ? "YES" : "NO");
@@ -166,6 +177,8 @@ void handle_serial_command(const String& cmd) {
         Serial.println("  red/green/blue - solid colour");
         Serial.println("  pixel0/pixel1 - single pixel test");
         Serial.println("  exp        - expression pedal ADC/MIDI value");
+        Serial.println("  latency    - show current flash latency");
+        Serial.println("  latency N  - set flash latency to N ms (0-500)");
         Serial.println("  usb        - USB connection status and descriptor info");
         Serial.println("  gpiotest   - raw GPIO pin diagnostic");
         Serial.println("  rawled     - bit-bang WS2812 (no library)");