Could someone test my alarm clock on Safari?

I decided to build a JavaScript alarm clock after seeing a rather cool looking one for sale online. I’ve tested it out in Chrome and Firefox, but I’m on a PC so I can’t get the latest version of Safari. I was wondering if someone could test it out for me to see if it works. You can program an alarm by clicking either one of the alarm buttons on the side, and entering a time. Thanks in advance!!

Hi I tried it with both alarms. When the time is reached, the “stop” button appears but there is no sound even if I set the sound level to maximum. When I checked the mp3 itself, it’s loud and clear. There must be some Safari-specific thing to add to make it work. Sorry.

tested on Safari 11.0 on OSX 10.11.6 (El Capitan)