Once-popular phonograph records are gradually spinning into oblivion, but the Boston Public Library is making an attempt to preserve them before the music stops.

The library announced Wednesday it was launching a project to transfer recordings — scratches and all — from its Sound Archives Collection to the Internet Archive, which will digitize the recordings and post them.

The library’s collection includes popular American music in a variety of formats, including 78 rpm records that go back a century. The musical genres include classical music, pop, rock, and jazz.

Once the library’s recordings are posted to the Internet Archive, any member of the public will be able to access them for free online, where rights allow, the library said in a statement.