diff --git a/Server/server_qt.py b/Server/server_qt.py
index ff26e59..2c315a8 100644
--- a/Server/server_qt.py
+++ b/Server/server_qt.py
@@ -310,16 +310,17 @@ class MainWindow(QtWidgets.QMainWindow):
     @confirmation_required("This operation will takeoff selected copters with delay and start animation. Proceed?")
     def send_start_time_selected(self):
         time_now = server.time_now()
+        time_lag = 0.1
         dt = self.ui.start_delay_spin.value()
         logging.info('Wait {} seconds to start animation'.format(dt))
         if self.ui.music_checkbox.isChecked():
             music_dt = self.ui.music_delay_spin.value()
-            asyncio.ensure_future(self.play_music_at_time(music_dt + time_now), loop=loop)
+            asyncio.ensure_future(self.play_music_at_time(music_dt + time_now + time_lag), loop=loop)
             logging.info('Wait {} seconds to play music'.format(music_dt))
         # This filter constraints takeoff in real world, when copter state was normal and then some checks were failed for a while
         # for copter in filter(lambda copter: copter.states.all_checks, self.model.user_selected()):
         for copter in self.model.user_selected():
-            server.send_starttime(copter.client, dt + time_now)
+            server.send_starttime(copter.client, dt + time_now + time_lag)
 
     @pyqtSlot()
     def pause_resume_selected(self):