https://www.ikmultimedia.com/products/st4/index.php?p=editor
In this tutorial, step inside the new SampleTank 4 Editor and learn how to start making your own SampleTank 4 libraries now. SampleTank 4 offers a cutting-edge sound engine, streamlined workflow and innovative new features. For those looking to bring their own sounds into SampleTank 4, the new SampleTank Editor provides a straightforward tool that enables you to convert your samples to SampleTank’s .st4i and .pak format with professional, polished results.
https://www.ikmultimedia.com/products/st4/index.php?p=editor