In PlayIt Manager, no. PlayIt Live features the ability to bulk analyse tracks but does not have the ability to post these changes back to PlayIt Manager. I am working on this.
Sorry, this is not currently possible in PlayIt Manager, it just uses some (what I thought were) sensible defaults. There are plans to make these thresholds configurable.
Is it possible to change the silence threshold when importing songs into playit manager? It clips the beginning and end quite aggressively and I can't see where to change the thresholds.
What would be great is to be able to add a defined period of time to the beginning/end (such as 1 second added to beginning/end from the detected beginning/end).
It's particularly the end that seems to get quite aggressively clipped.