The reasons for the slow tone of digital music players are as follows:

1. Hardware problems: There may be problems with the hardware devices of digital music players, including storage devices, audio processing chips, etc. These hardware issues cause slow playback or other abnormalities.

2. Software problems: There are problems with the software of the digital music player, such as virus or malware infection, system errors, etc. These issues cause slow playback or other abnormalities.