First, whether it is to modify or upgrade Kailide, it is best to use the main program of Kailide corresponding to the machine, so that there is generally no sound.

Second, some main programs, Kailide, are not updated at present. There are two situations:

1. Some machine brands have changed the equipment number of the main program of Kay LiDE. In this case, it is necessary to confirm what the main program of the machine is, and then find a new main program device number to replace it, so that there will usually be sound.

2. The main programs of some machine brands are no longer updated. If there is no sound after being replaced by other main programs, replace the sound file in the new main program with the sound file NaviOneSCH.dll of the local special main program, so there may be sound.

Third, some machines may have to enter the multimedia state (MP3) before they can enter the Kay LiDE map.