Hi Paolo,
You could try in the "Edit" tab the Wave Start Offset option. You probably will have to adapt the Start Offset Attack also. It is possible to make one or more slots with the samples adjusted with Wave Start Offset.
Then you can make a choice.
In ViPro it is possible to adapt the Wave Start Offset with automation. Unfortunately that isn't (yet?...) the case in the Synchron Player.
Sometimes you can get reasonable results with the attack automation. That automation can diminish the loud transition sounds. I hope this helps...