If you are using a computer it is possible that your concert is automatically muted due to a browser restriction. Try to hover over the stream with the cursor until the player controls appear, then click the Volume indicator once to mute and then again to unmute.
If you are using a mobile device please tap on the video 3 times.
Our support team is online to help during the concert. Reach out to us via email at email@example.com or start a chat with our support team from the event page on a desktop computer by clicking the Support indicator at the bottom left-hand side of the concert page.