StampAuctionNetwork Audio is supported in Mozilla Firefox, Internet Explorer, Edge, Chromium and Google Chrome, Blink-based Opera, as well as all browsers for Unix-like systems relying on GStreamer for multimedia formats support. Safari requires iOS 11 and macOS High Sierra.
Quick Help if you can't hear the Auction. First make sure they are not on break. Look at the messages on the "join the public auction" -- verify that they indeed are conducting the auction. Next make sure they do audio. Some companies do not use audio, for example Aldrich and Enchères Champagne Auctions do not use audio.