[Feature Request/Inquiry] CQT inversion

[IvanDSM]

Hello,

I've found out about this project while looking for CQT support in torchaudio. Thanks a lot for the very good work on this library! :)

I'd like to ask if it would be possible to implement CQT inversion. I noticed that librosa has librosa.icqt, but I understand that it's probably not easy to implement this in a manner to enable fast GPU support.

[KinWaiCheuk]

Hi Ivan, thank you for your suggestion.
Yes, we do have plan to implement reverse CQT very long time ago but we have been occupied with various projects.
If you know anyone who is capable of doing so, feel free to invite them to contribute to this project. Pull request is very welcome :)

[dorienh]

Hi all,

We've done a full overhaul in nnAudio2 that targets current PyTorch (2.x) and NumPy 2.x with an expanded test suite: https://github.com/AMAAI-Lab/nnAudio2

This new version includes the long awaited inverted CQT.

pip install nnaudio2