Hey,
been building maps for some time now but one problem bothers me and I can't find a clue myself for it: sound doesn't work in new objects (vehicles) inserted in self created maps (objects included in Jarvin map produce sound as supposed to). Does anybody have an idea what is going wrong?

Sounds like you are describing something whose solutions are the following:

[b][color=#FF8000]The FAQ / Everything You Need Thread Version 2.0[/color][/b] wrote:...
Sound
...

• How to add missing shipped sounds
• How to add missing sounds without creating a new .lvl

...

Thank's helped a lot