The Logic Off Topic list

Hi,
This OT has been bugging me.
When you use samples from a sample disk, you pay a licence fee(included in the price of the sample disk) to use samples.
What happens if you have some synths and you sample the sounds of those synths and you use them when recording a project?
Are you doing something illegal?
With samples you get those tiny letters that say something about copyrights. But in my synth manual there isn't anything that says that the samples in the synth are protected by copyright.
I wanted to discuss this since a lot of musicians do this when going on the road. But there are also people who distribute free samples of known synths on the net for free; I won't mention the link, but there were some pretty nice Soundfonts of some of the big name synths like Waldorf, Novation and Korg Oasys.
I've also done some sampling of my synths, in case they go to synth-heaven, :-). Put them sounds nicely on CDR.
So, when is it legal to use samples and when not?
TIA,
Yoonchi.