From the Boston Public Library.
The Boston Public Library (BPL) sound collection includes hundreds of thousands of audio recordings in a variety of historical formats, including wax cylinders, 78 rpms, and LPs. The recordings span many genres, including classical, pop, rock, jazz, and opera – from 78s produced in the early 1900s to LPs from the 1980s. These recordings have never been circulated and were in storage for several decades, uncataloged and inaccessible to the public. By collaborating with the Internet Archive, Boston Public Libraries audio collection can be heard by new audiences of scholars, researchers and music lovers worldwide

https://archive.org/details/78rpm_bostonpubliclibrary

Wow, first page of 1958, Bobby Blue Bland, "Little Boy Blue".

I listened to two songs, both files full of extraneous noise.

l
Most of these will have scratching and wow/flutter as I believe they were recorded directly from a turntable without any digital cleanup. Still it is great to go back in time as in 1930's and listen to the like of Loise Armstrong trumpet playing. It goes back to 1901 recordings, some titles are truly racial..

Yeah, I noticed that too Stephen. I guess that they're not spending a lot of time cleaning the media, new needles, etc . . With that large of a collection it seems like they just want to get it out there to the public.