Update Aligner model and tutorial to add NGC checkpoint loading

[redoctopus]

Signed-off-by: Jocelyn Huang [email protected]

What does this PR do ?

Adds NGC model loading for the RAD-TTS Aligner.

Collection: TTS

Changelog

• Add newly published NGC checkpoint to list of pretrained Aligner models
• Update tutorial to load this checkpoint instead of a local one

Usage

from nemo.collections.tts.models import AlignerModel

aligner = AlignerModel.from_pretrained("tts_en_radtts_aligner")

PR Type:

• [ ] New Feature
• [ ] Bugfix
• [x] Documentation

[ekmb]

ran your tutorial a couple times, but still hit error like,

Error(s):	`pynini` not installed, please install via NeMo/nemo_text_processing/pynini_install.sh

See my gist here: https://colab.research.google.com/gist/XuesongYang/918a2ecc7c93cde7c65f3fa0a1241606/aligner_inference_examples.ipynb

@redoctopus, we should add the following to TTS notebooks:

! wget https://raw.githubusercontent.com/NVIDIA/NeMo/main/nemo_text_processing/install_pynini.sh
! bash install_pynini.sh

[redoctopus]

@ekmb Thanks!

I've updated the installation in this notebook, and I'll make a PR to update it for all other TTS notebooks shortly.