(Stable) Improved Autograd Support
Along with the work of Complex Tensor Migration and Filtering Improvement, we also added autograd tests to transforms. lfilter, biquad and its variants, and most transforms are now guaranteed to support autograd. For more details, refer to the release note.
(Stable) Improved Windows Support
Torchaudio implements some operations in C++ for reasons such as performance and integration with third-party libraries. These C++ components were only available on Linux and macOS. In this release, we have added support to Windows. With this, the efficient filtering implementation mentioned above is also available on Windows.
However, please note that not all the C++ components are available for Windows. “sox_io” backend and torchaudio.functional.compute_kaldi_pitch are not supported. 
(Stable) I/O Functions Migration