This past weekend, I took time to indulge in a side hobby that I haven't had much time for lately: early audio recordings. The occasion was a melancholy one. Fine Groove Records, one of the finest and last independent music shops, is closing its doors after 26 years of peddling new and used music in Northfield, MN. I collared a friend who also collects 78rpm records and we spent the afternoon rifling through the shop's hundreds of shellac disks and LPs, searching for overlooked gems. (For…