如何获得振幅矢量？

Question

我试过AVFoundation，AudioKit和EZAudio。但我不能。 我想要一些方法来获得整首歌的所有幅度（不播放音乐），以获得平均幅度。有谁知道怎么样？ 我不需要整个算法。欢迎提供实例和前进方法。

do {
   let file = try AKAudioFile(forReading: URL.init(string: Bundle.main.path(forResource: "TFB9", ofType: "mp3")!)!)
   self.analyzedPlayer = try AKAudioPlayer(file: file)
   self.player = try AKAudioPlayer(file: file)
}
catch {
   print(error)
}

let equalizerFilter = AKEqualizerFilter(analyzedPlayer, centerFrequency: 9000, bandwidth: 1000, gain: 9)
let lowPassFilter = AKLowPassFilter.init(equalizerFilter, cutoffFrequency: 10000, resonance: 0)
hightPassFilter = AKHighPassFilter.init(lowPassFilter, cutoffFrequency: 8000, resonance: 0)

AKAmplitudeTracker.init(hightPassFilter, threshold: 0.42, thresholdCallback: {_ in
   self.delegate?.signal()
})