It looks like Surfboard is a wrapper combining feature extraction methods from Librosa and other libraries, plus some of its own implementations. Is that correct?
https://github.com/novoic/surfboard/blob/master/COMPONENTS.m...
> Surfboard actually builds on LibROSA for a few of its components (e.g. MFCCs) and its functionality (e.g. loading .wav files into memory). In that sense it is the same as LibROSA for a lot of their communal functionality.
> LibROSA was built to extract individual components for music analysis. The components we built into Surfboard are largely different to those in LibROSA (apart from a few). If you are interested, please read our paper and documentation to find out more!