Sorry that it does not work for me:
The path
https://stavrou.synology.me:5001/as/sha … BNZS5tcDM=

plays the mp3 via browser

but the script
audioUrlMp3="https://stavrou.synology.me:5001/as/sharing/alDp68i1/L211c2ljL0lPQU5OSVMvTU9CWS9Nb2J5LVdhaXQgRm9yIE1lICgyMDA5KS8xMiBXYWl0IEZvciBNZS5tcDM="

does not work .

What is wrong with it?