Any plan for a `functional` module?

[Chin-Yun Yu]

Hi, as the title said, is there any plan to provide a functional module, like PyTorch did, for some state-less transformations?
For example, conversion functions like lar2par, par2lpc, levdur, and so on depend on an order parameter that can be inferred from the input data.
Having them as pure functions would be great without creating a nn.Module instance.
It would also be cool to have equivalent functional counterparts of other transforms, with default arguments that work out of the box when chaining the functions, similar to how librosa does.

[Takenori Yoshimura]

If I can write the functional modules in a sophisticated way, it will be released as version 2.0.
I'll try, but sorry if it doesn't work.

[Chin-Yun Yu]

I think we can first transfer some easy ones (those I mentioned above). Just moving forward into a standalone function. Should be straightforward.
I can make a draft PR based on this idea. Let me know if that works. 😀

[Takenori Yoshimura]

I made a PR for this issue (#66).
Please use the v2 branch and reopen this issue if you find any problems.

[Chin-Yun Yu]

Thanks for the quick and timely help! I'll definitely check out the v2 branch. Thanks a lot!