I am running Superlab 4.5.3 on a Mac to create experiments, then running the experiments on PCs running Superlab 4.5.3 run-only. Previously, I had no problems with this setup. Recently, however, some of my sound files are being cut off during presentation, either at the beginning, the end, or sometimes both ends of the files. These are short duration sound files for monosyllabic words, around 250ms long. They are saved in .wav file format, which is what I have always used. Why are these files now being cut off?