Using an audio file for the sound

[MilesV64]

Thanks for making this! I'm interested in using an audio file for the click sound rather than a generated triangle wave, but it doesn't seem to work.

The change (also using only one sound rather than 2):

    let clickURL = Bundle.main.url(forResource: "metronome.click", withExtension: "wav")!
    let audioFile = try! AVAudioFile(forReading: clickURL)
    let audioFormat = audioFile.processingFormat
    let audioFrameCount = UInt32(audioFile.length)

    audioBuffer = AVAudioPCMBuffer(pcmFormat: audioFormat, frameCapacity: audioFrameCount)
    audioBuffer.frameLength = audioFrameCount
    try! audioFile.read(into: audioBuffer!)
    
    self.audioFormat = buffers[0]!.format
    self.bufferSampleRate = audioFormat.sampleRate
    
    initiazeDefaults()

    engine.attach(player)
    engine.connect(player, to:  engine.outputNode, fromBus: 0, toBus: 0, format: audioFormat)

This works perfectly at BPMs below 90 or so, but as the BPM increases the clicks get quieter and quieter until they disappear. Any thoughts on how to support audio files?

EDIT: Sound file works if it's 0.02 seconds in duration or less it seems.