diff --git a/src/main.c b/src/main.c
index 9920c54..35bffec 100644
--- a/src/main.c
+++ b/src/main.c
@@ -503,7 +503,7 @@ static void sync_toggle_timer_isr_handler(nrf_timer_event_t event_type, void *p_
 				LOG_INF("SDU Sync Ref: %d", capture_time_us);
 				break;
 			case ALTERNATE_TOGGLE_STATE_W4_AUDIO_OUT:
-				alternate_toggle_state = ALTERNATE_TOGGLE_STATE_W4_AUDIO_OUT;
+				alternate_toggle_state = ALTERNATE_TOGGLE_STATE_IDLE;
 				gpio_pin_set_dt(&alternate_toggle_pin, 0);
 				LOG_INF("Audio Out: %d", capture_time_us);
 				break;
@@ -522,7 +522,7 @@ static void setup_sdu_sync_to_audio_out_timer(uint32_t delay_us) {
 		current_time_us = nrf_timer_cc_get(NRF_TIMER2, NRF_TIMER_CC_CHANNEL1);
 	}
 	uint32_t sdu_sync_ref_us = current_time_us + delay_us;
-	LOG_INF("TOGGLE TIMER now %u, sdu_sync_ref %u", current_time_us, sdu_sync_ref_us);
+	LOG_INF("TOGGLE TIMER now %u, delta %u, sdu_sync_ref %u", current_time_us, delay_us, sdu_sync_ref_us);
 	nrfx_timer_compare(&sync_toggle_timer_instance, NRF_TIMER_CC_CHANNEL1, sdu_sync_ref_us, true);
 	alternate_toggle_state = ALTERNATE_TOGGLE_STATE_W4_SDU_SYNC_REF;
 }
@@ -541,9 +541,6 @@ int main(void)
 	nrfx_timer_enable(&sync_toggle_timer_instance);
 	alternate_toggle_state = ALTERNATE_TOGGLE_STATE_IDLE;
 
-	// simulate received packet
-	setup_sdu_sync_to_audio_out_timer(100000);
-
 	/* incoming events and data from the controller */
 	static K_FIFO_DEFINE(rx_queue);
 	int err;
@@ -596,11 +593,6 @@ int main(void)
 	gpio_pin_configure_dt(&alternate_toggle_pin, GPIO_OUTPUT_INACTIVE);
 #endif
 
-	// try to toggle pin
-	while (1) {
-		gpio_pin_toggle_dt( &alternate_toggle_pin );
-	}
-
 	bt_hci_raw_cmd_ext_register(&cmd_list, 1);
 #endif
 
@@ -637,6 +629,12 @@ int main(void)
 			// get rx timestamp = sdu sync reference: Packet Type (1) | ISO Header (4) | Timestamp (if TS flag is set) 
     		uint32_t timestamp_sdu_sync_reference_us = little_endian_read_32(packet, 5);
 
+			// schedule SDU Sync Ref to Audio Out Toggle
+			if (alternate_toggle_state == ALTERNATE_TOGGLE_STATE_IDLE) {
+				int32_t sdu_sync_ref_delta_us = (int32_t)(timestamp_sdu_sync_reference_us - timestamp_toggle_us);
+				setup_sdu_sync_to_audio_out_timer(sdu_sync_ref_delta_us);
+			}
+
 			// calculate time of toggle relative to sdu sync reference (usually negative as the packet is received before it should be played)
     		int32_t delta_us = (int32_t)(timestamp_toggle_us - timestamp_sdu_sync_reference_us);