XACT download

Do I need to use XACT or will pipeline do the work that was used for?
If I do where do I get it from
what do I use to process the xap file it produces?

Pipeline is integrated in the Monogame package, you usually double-click the Content/Content.mgcb file in visual studio solution explorer and add importing settings via the Pipeline executable that should open.
XACT is not required, but you might need it for certain advanced audio features.

Ok, Thanks for that.