有了Google Cast Chromecast iOS SDK (Chromecast)，有可能有一个单独的音频流的视频吗？

import GoogleCast

class ViewController: UIViewController, GCKMediaMetadataDelegate {
    var castContext: GCKCastContext!
    var mediaInfo: GCKMediaInformation!

    override func viewDidLoad() {
        super.viewDidLoad()
        
        castContext = GCKCastContext.sharedInstance()
        castContext.delegate = self
        
        let mediaURL = URL(string: "https://example.com/audio.mp3")!
        mediaInfo = GCKMediaInformation(contentID: "audio.mp3", streamType: .none, contentType: "audio/mp3", metadata: nil, streamDuration: nil, customData: nil)
        
        let request = GCKMediaLoadOptions()
        request.mediaLoadOptions = [:]
        
        let mediaControlChannel = GCKMediaControlChannel()
        mediaControlChannel.delegate = self
        mediaControlChannel.loadMedia(mediaInfo, withOptions: request)
    }
    
    // Implement other required delegate methods...
}