This sites are really funny with sound and music. If you don't hear anything on either side, you've turned off your Flash Player. Then just turn it on again.
Firefox Click on the menu button and select the category "Add-ons". Then go to the "Plugins" and search for the entry "Shockwave Flash". Select the "Always activate" option here.
Google Chrome In older versions you can reach the settings under Chrome plugins. But if you already surf with a current version, Flash can no longer be easily switched on and off. The player can only be configured if the "chrome://settings/content/flash" command is entered in the address bar. There you can set it so that the browser on each page asks if it should allow the Flash Player.
Microsoft Edge Again, Flash is activated via the menu button and the "Settings". Scroll down there and click on the "Show Advanced Settings" button. Simply select the "Use Adobe Flash Player" option. Internet Explorer If you still surf with the Internet Explorer, then click on the gear icon. Then select the Manage Add-Ons option. Go to All Add-Ons and search for the "Shockwave Flash Object" entry. Click on it and then click on the "Activate" button