The Joy Of The Single - 2012 - UK
When Albums Ruled The World - 2013 - UK
Sound City - 2013 - USA

Three music-biz documentaries.
First focuses on the single, typically the wax 45.
Mostly white geezers and burnouts warble their memories, display collections and jukeboxes.
Gradually 7 inchers lost influence as LPs gained prominence.
Second doc is about albums, specifically concept albums.
Dylan, Pepper, Yes, Floyd - you know the terrain.
Third doc covers Sound City Studio, famed recording venue of the 70’s and 90’s.
Analogue studio. Gone now, replaced by digital, Pro Tools, etc …

All docs were enjoyable.
Third one wandered near the end, slipping from the heyday of the 70’s to Dave Grohl’s attempt to recreate the era.