code: func NewAudioUpload(chatID int64, file interface{}) AudioConfig {
  	return AudioConfig{
  		BaseFile: BaseFile{
  			BaseChat:    BaseChat{ChatID: chatID},
  			File:        file,
  			UseExisting: false,
  		},
  	}
  }
docs: // NewAudioUpload creates a new audio uploader.
  //
  // chatID is where to send it, file is a string path to the file,
  // FileReader, or FileBytes.