GitLab

Summary:
Pull Request resolved: https://github.com/pytorch/audio/pull/3365

Current design of forced_align accept 2D Tensor for `log_probs` and 1D Tensor for `targets`. To make the API simple, the PR make changes to only support batch Tensors (3D Tensor for `log_probs` and 2D Tensor for `targets`).

Reviewed By: vineelpratap

Differential Revision: D46126226

fbshipit-source-id: 42cb52b19d91bbff7dc040ccf60350545d75b3a2