Need Info on train dataset 'augmentor' key in the config.yml file.
Found this  lines in the stt_es_conformer_ctc_large config  file 

'augmentor': {'noise': {'prob': 0.1, 'manifest_path': '/rir_noises_tarred/noises_20s_tarred/tarred_audio_manifest.json', 'audio_tar_filepaths': '/rir_noises_tarred/noises_20s_tarred/audio_{0..255}.tar', 'min_snr_db': 0, 'max_snr_db': 30}, 'transcode_aug': {'prob': 0.2}}, 'is_tarred': False, 'tarred_audio_filepaths': None, 'shuffle_n': 2048}

could not find reference of this key  in any notebooks in the tutorial dir.

how to obtain these nose manifest ?  (is this related to the online_noise_augmentation.ipynb notebook)?,  
will setting this to none affect the new model being trained?
