preprocessing implementation in other languages

I am interested in using CREPE as ONNX model in Unity and C#.
I found a repo that converted the models to ONNX format: https://github.com/yqzhishen/onnxcrepe

What I am missing is the pre- and post-processing.
Is there an implementation of the pre- and post-processing required for CREPE in other languages, such as C#, Java, or C?
