Came across this little freebie, handy tool for creating loop markers for samples, such as in omnisphere. No install, easy to use, zero crossing, normalize etc. In fact its bloody excellent! He has some other free sampling related software too including a sample mapper that works with Dim Pro. The Site is in german, but just use google translate.
 
https://www.bjoernbojahr.de/endlesswav.html

Thank You, Looks useful.

This is one of those things I'd like to see updated with a better GUI. Great tool but a bit too complicated interface at times.