Using a PHP source for the soundFile

For security reasons my sound files are located outside of the webspace and provided via a php program. However when I provide the URL query string for the php program as the soundFile parameter the player just shows “buffering”. Note that using the php URL query string as a direct anchor tag does successfully download the sound file. It’s only in the AudioPlayer that there are problems. I’m attempting to embed the player as:

AudioPlayer.embed("audioplayer_1", {soundFile: "https://my_server/serve_song.php?song_id=123"})

Thanks for your help

https://www.ads-software.com/extend/plugins/audio-player/