Sampling a sample can definitely be useful, if the original sample is in an inconvenient format (e.g. inside some hardware). Of course, this business is in a le

Sampling a sample can definitely be useful, if the original sample is in an inconvenient format (e.g. inside some hardware). Of course, this business is in a legal gray area, because the recordings inside the machines are copyrighted. But they are resold with some "processing" that could potentially be considered transformative enough. This is niche enough that I doubt it will ever be tried in court.