SpeechVoice.swift

let speechVoices = AVSpeechSynthesisVoice.speechVoices()
speechVoices.forEach { (voice) in
  print("**********************************")
  print("Voice identifier: \(voice.identifier)")
  print("Voice language: \(voice.language)")
  print("Voice name: \(voice.name)")
  print("Voice quality: \(voice.quality.rawValue)") // Compact: 1 ; Enhanced: 2
}

/*
Example output:
**********************************
Voice identifier: com.apple.ttsbundle.Karen-compact
Voice language: en-AU
Voice name: Karen
Voice quality: 1 <- Compact voice track
**********************************
Voice identifier: com.apple.ttsbundle.Karen-premium
Voice language: en-AU
Voice name: Karen (Enhanced)
Voice quality: 2 <- Enhanced voice track
*/