It all depends...
But I suspect you're victim of some confusion here: in copyright (and so-called 'neighbouring rights') law, whenever there's mention of a "producer" getting royalties, it typically does *not* refer to rewarding the creative efforts and contributions of the person responsible for the sound, e.g. tweaking knobs behind the mixing desk in the studio. It's simply about rewarding the *investor* (i.e. the owner of the record label).
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