One strange aspect of the use of the compulsory licence. If the cover creates a new melody, and all the (composition) copyrights stay with the original author, in that case the original author would seem to gain an expanded set of rights including the copyright on the new melody.
Another strange twist in the area of compulsory licence is that it only applies to fairly close versions. If you want to make a truly derivative work, in my understanding, the compulsory licence doesn't apply: You have to negotiate a special licence from the copyright holder. For example if you want to change the words.
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One strange aspect of the use of the compulsory licence. If the cover creates a new melody, and all the (composition) copyrights stay with the original author, in that case the original author would seem to gain an expanded set of rights including the copyright on the new melody.
Another strange twist in the area of compulsory licence is that it only applies to fairly close versions. If you want to make a truly derivative work, in my understanding, the compulsory licence doesn't apply: You have to negotiate a special licence from the copyright holder. For example if you want to change the words.