Problem 1: When I try to add 300 ms to each file in batch mode, it adds 2000 ms, not 300 ms. It evens shows 300 ms, but adds 2000 ms. When I reinstalled it, instead of false 2000 ms, it added 0 ms, not 300 ms that I needed and entered. That's true about adding to the end of files too. Problem 2: Is there any way to batch delete 1700 ms from start and end of a group of files? I couldn't find such a simple thing. Thanks.