I hereby declare that my original work can be relicensed to GPLv2. This includes the readme, changelog, osfx_34.wav, osfx_50.wav and opensfx.psfo.
I furthermore declare that my modifications can be relicensed to GPLv2 as long as the original creator of the samples I edited/mixed are allowing relicensing to GPLv2 as well.
Since we haven't heard back from rubidium yet, I will probably just replace all of the sounds edited by rubidium by taking the sound sources and re-edit them, thus circumventing the license drama. :P
That's a fairly straightforward task that usually only involves cutting off the sounds and fading in and out. The result will probably sound like very similar, players won't notice a difference for those sounds while not being a 1:1 copy of Rubidium's work technically. This is easy for me.
osfx_34.wav and osfx_50.wav are just trivial empty sounds that everyone can generate in Audacity with a few clicks, it is silly to claim copyright on those. I will just slap a CC0 on those, anything else is just silly. But that's kind of a special case here due to triviality.
It's not about my "personal license preferrence". It's about moving to an actually libre license to begin with. Which one we end up exactly, I don't really care deeply, as long it's libre.
As for the readme and text files … Guess we have to roll with GPLv2+ or CDDL (see later posts of Rubidium) for those particular files. I won't throw away the README file just for that. It's going to be fine. I guess a dual licensing would be best, so people can pick and choose.
I guess we'll end up with a license hybrid: CC BY-SA 3.0 for the sounds, GPLv2+ or CDDL for all the text and script files. In any case, the main point is that it's 100% FOSS in the end. CC Sampling Plus must be killed with fire!