Hi,
If you add
-disablerailjointsound
on the trainzoptions.txt, no clickety-clack sound will be heard for all traincar kind objects. No other parameters are possible.
If you use the container/tag
disable-extra-track-sounds 1
on a traincar kind config.txt, no tracksound will be heard from that particular object, not from every of them.
Hope it helps to clarify.
Futhermore:
Remember there's an option to add a certain tracksound object (you may have or create) to a certain type of track you wish to change tracksound to.
Alberte