Felik, on 21 May 2014 - 01:45 AM, said:
But I thought that US laws only allow you to use 3 seconds of someone else's work as a sample, otherwise you can be sued. Isn't that correct?
Some samples seem to surpass that margin.
Usually not more than 10% of any work can be used for another work, unless permission is granted.
Sampling however is a different case as it's using significant but small parts to bring out a piece more (at least for Hideki) and some musicians like to do it. They can be sued but the original musicians could never know, be fine with it (and actually like it) or just not bother.
Also, the samples could be (which is the case here as Spindash says 'from their respective packs') from library where you can use them royalty-free as long as you pay. That way, any source could be using them and they're not doing anything illegal.
Hope that clarified things a bit