[Zubersoft]

That indicates that the loading of the file for the song is taking about four seconds, which is definitely slow. How many pages are shown for the chord pro file in MobileSheets? It's unusual for a chord pro file to take that long to load. If your Linx device running on battery? If so, did you set it to use more battery power for better performance? That will probably speed up the CPU and load the song quicker.

Mike