Is it legal to implement the SF2 format?

I’m thinking of creating an iOS app that can read SoundFonts, so I’m trying to implement an SF2 parser. I found the specification here, but this part caught my eye:

> AUTHORS OF THIS SPECIFICATION DISCLAIM ALL LIABILITY, INCLUDING LIABILITY FOR
> INFRINGEMENT OF PROPRIETARY RIGHTS, RELATING TO IMPLEMENTATION OF INFORMATION IN THIS
> SPECIFICATION. AUTHORS OF THIS SPECIFICATION ALSO DO NOT WARRANT OR REPRESENT THAT
> SUCH IMPLEMENTATION (S) WILL NOT INFRINGE ON SUCH RIGHTS.

Is this “just” standard legalese or does implementing the format actually constitute copyright/patent infringement? If so, how are programs like MuseScore allowed to exist? Do they all have a license? Is there some other, untainted specification that I’m not aware of?

I searched for an answer to this, but couldn’t find anything — information on the format in general seems sparse. Hoping someone here can answer.