{
  safe: (val) => (val != null ? '' + val : ''),
  base_url: () => 'https://api.elevenlabs.io',
  tts_url: (voice_id) => 'https://api.elevenlabs.io/v1/text-to-speech/' + voice_id,
  sts_url: (voice_id) => 'https://api.elevenlabs.io/v1/speech-to-speech/' + voice_id,
  dubbing_audio_url: (dubbing_id, lang) => 'https://api.elevenlabs.io/v1/dubbing/' + dubbing_id + '/audio/' + lang,
  voice_url: (voice_id) => 'https://api.elevenlabs.io/v1/voices/' + voice_id,
  format_tts: (voice_id, chars) => 'Generated speech for voice ' + voice_id + ' (' + chars + ' chars)',
  format_stt: (duration) => 'Transcribed ' + duration + 's of audio',
  format_dubbed: (dubbing_id, lang) => 'Dubbing ' + dubbing_id + ' ready in ' + lang
}
