A better example would be if you make your own version of Bosca. I don't think that the MIT license (nor any free software license for that matter) covers use of a program but only direct derivatives of it.
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Yes, you are correct that the MIT license text only explicitly covers full copies or copies of significant portions of the software, for the purposes of including the MIT license text itself.
I’m sorry if my original post appears misleading in that regard. I had to answer this person several times (though those messages are now gone for some reason), and this was my attempt to summarize everything that I have explained before. That is to point out that:
- MIT license’s laymen implication and spirit is to give credit where possible;
- It is customary to credit tools used in the production of your game/video/whathaveyou;
- This does in no way transfer to people who get from you, including purchases, creative work made with the tool.
Their main concern is whether I put any restriction or claim any partial ownership over their songs, and the answer to that is NO. The rest is just elaboration.