The sound quality is bad, there’s crackling in the sound being played.

First make sure your battery is fully charged. If that’s the case and there’s still a sound quality problem, take the SD card out, the files off, reformat the SD card then put the files back on. There is a small SD card to USB reader included with your saber. Please see this video for how to remove your battery, and gain access to your SD card, link in description to your specific saber: