AP
val request = DownloadManager.Request(Uri.parse(trackUrl))
val desc ="description"
request.setDescription(desc)
val name = "${track.artistName} - ${track.title}"
request.setTitle(name)
val fileName = "$name.mp3"
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "$myFolder/$fileName")
val manager = app.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
manager.enqueue(request)