Ok, go to your calendar and click on plus + icon to set event schedule.
Select date and time
Make sure you select X minutes before as email.
Save and come out to main calendar.
Click on 3 lines top left, settings, general, untick "use standard time" then select the tone you'd like underneath. Come out one and then click "events" and make sure both ten minutes before and ten minutes before as email are showing.
You should now have audible alerts for every schedule set
