diff --git a/firmware/Gravity/Gravity.ino b/firmware/Gravity/Gravity.ino
index 3b388d4..98becf2 100644
--- a/firmware/Gravity/Gravity.ino
+++ b/firmware/Gravity/Gravity.ino
@@ -135,14 +135,10 @@ void HandleIntClockTick(uint32_t tick) {
                 break;
         }
 
-        const uint32_t pulse_high_ticks = CLOCK_MOD_PULSES[clock_index];
+        const uint16_t pulse_high_ticks = pgm_read_word_near(&CLOCK_MOD_PULSES[clock_index]);
         const uint32_t pulse_low_ticks = tick + max((pulse_high_ticks / 2), 1L);
-
-        if (tick % pulse_high_ticks == 0) {
-            gravity.pulse.High();
-        }
         if (pulse_low_ticks % pulse_high_ticks == 0) {
-            gravity.pulse.Low();
+            gravity.pulse.Update(!gravity.pulse.On());
         }
     }