// Time interval to get percent of loudness
open var timeInterVal: TimeInterval = 0.3
// File name of audio
open var audioFilename: URL!
// Audio input: default speaker, bluetooth
open var audioInput: AVAudioSessionPortDescription!

// Recorder did finish
open var recorderDidFinish: ((_ recocorder: AVAudioRecorder, _ url: URL, _  success: Bool) -> Void)?
// Recorder occur error
open var recorderOccurError: ((_ recocorder: AVAudioRecorder, _ error: Error) -> Void)?
// Percent of loudness
open var percentLoudness: ((_ percent: Float) -> Void)?

// Ask permssion to record audio
public func askPermission(completion: ((_ allowed: Bool) -> Void)?)
// Start recording
public func startRecording()
// End recording
public func endRecording()
// Pause recorinding
public func pauseRecording()
// Resume recording
public func resumeRecording()