I don't own the library, in fact I got it from another github repo: https://github.com/bzgeb/portsf.
It's super nice and very intuitive for anyone that would like to learn audio programming. Actually is used in The Audio Programming Book by Boulanger, Lazzarini and Mathews
Warning!
The .lib file created for windows in this project only supports build for x86.
If you want to change something of the .lib, go to the makefile and do your stuff.
Hope you like it