ASR training using ESPnet2 library calls

Hi - I am looking for an example notebook where I want to train an ASR on a dataset such as TIMIT using ESPnet2 library calls. The data preparation is required to be done separately in Python (not using recipes) for 'sound' or 'npy' (not Kaldi style) as would be required. Any pointer on the training part would be helpful./Tirthankar.

Here is my experiment but this is giving error on epoch 1 training.
[timit_train_espnet2.md](https://github.com/espnet/notebook/files/6312292/timit_train_espnet2.md)