Filters by Will Pirkle ported to SOUL

These filters are ported from the C++ projects in Will Pirkle's books and the application notes on his website

• https://www.willpirkle.com/books/
• https://www.willpirkle.com/app-notes/

uncomment/comment the filters in the FilterTester graph to try the different types. You may also need to comment/uncomment parameters depending on the filter

try it online on the SOUL playground:

VAFilters: https://soul.dev/lab/?id=c3600297e9789bd99610315411ab2138

Biquads: https://soul.dev/lab/?id=ee458240c45993486f1bc20e4094c346