Doesn't anyone look at tags anymore? You know, the metadata? Or didn't anyone think to um, bypass the whole conversion to actual sound waves and back to digital stream.
When it was taped off-air by your father in 1972 and you're trying to figure out what it is, the tags aren't exactly going to be helpful. That said, it would be nice to just play the MP3 or WAV off local storage instead of having to stick a tablet it next to the speaker.
When this sort of thing works, it can be really, really useful. For example, Michael Garrison's "In the regions of sunreturn", which I'd been trying to identify for nearly 20 years. Probably taped off a record borrowed in the early 1980s. The cassette wasn't labelled properly, and the album was completely instrumental. It took an awful lot of attempts with SoundHound to identify, and was made worse by the fact that the synthesizers used became fashionable in techno and I think some hip-hop stuff later, giving many false positives. But I can't think of any other way to find out what it was, short of sticking a clip on youtube and hoping I get a takedown.