Create Waves Visualization Video Swift

Here is what I am trying to do:

The screenshot is taken from a 6s iPhone.

I have been working on create video wavefrom and I would like to draw a waveform which looks look like the first screenshot. I am using VIWaveformView Github pods to draw waves. but I m confused how to draw same waves.

Code:

@IBOutlet weak var vWmainWave: VIWaveformView!
override func viewDidLoad() {
    super.viewDidLoad()
    vWmainWave.waveformNodeViewProvider = BasicWaveFormNodeProvider(generator: { () -> NodePresentation in
        let view = VIWaveformNodeView()
        view.waveformLayer.strokeColor = UIColor(red:0.86, green:0.35, blue:0.62, alpha:1.00).cgColor
        return view
    }())
    vWmainWave.layoutIfNeeded()
    if let url = Bundle.main.url(forResource: "bulletTrain", withExtension: "mp4") {
        let asset = AVAsset.init(url: url)
        _ = vWmainWave.loadVoice(from: asset, completion: { (asset) in
        })
    }
}

Question: How to show the same waves as the original image(first screenshot)?

Can someone please explain to me how to draw same, I've tried to draw these waves but no results yet.

Any help would be greatly appreciated.

Thanks in advance.

from Create Waves Visualization Video Swift