In the US, sound recordings used to be handled under state copyright law. That's a phrase which should give any lawyer younger than 60 an aneurysm, as there is no such thing today - sound recording rights were brought into federal law in the 1970s, and preemption[0][1] means that states can't extend copyright law at all anymore. However, the actual recordings weren't properly grandfathered into federal law until 2018 with the passage of the MMA[2], which includes concepts from the CLASSICS Act[3].
Under the MMA, pre-federal sound recordings get a new copyright term on a sliding scale, with the lowest term length being 3 years for recordings made before 1923. Since the MMA was passed in 2018, those new terms expire... this January.
[0] https://en.wikipedia.org/wiki/Federal_preemption
[1] https://www.law.cornell.edu/uscode/text/17/301