I adjusted: wp-miniaudioplayer/js/jquery.mb.miniPlayer.js
Replaced:
location.href = map.downloadUrl + “?filename=” + encodeURI(downloadURL) + “.mp3” + “&fileurl=” + encodeURI(player.opt.mp3); //title.asId()
By:
location.href = encodeURI(player.opt.mp3) + “?filename=” + encodeURI(downloadURL) + “.mp3” + “&fileurl=” + encodeURI(player.opt.mp3); // title.asId()