I think I sort-of knew many of the facts that Elijah Wald recounts “in this piece in the Financial Times”:http://www.ft.com/cms/s/2/eeca345e-8de1-11de-93df-00144feabdc0.html . Still, knowing and putting-together are two different things. You couldn’t listen to 78s as “background music” because even with an auto-changer, you’d have to get up every 15 minutes – hence the importance of radio if you wanted a soundtrack to other activities. Why did jazz singers such as Billie Holiday record such a wide repertoire of “standards”? They were packaging the hit songs of their day for a particular audience (with other singers styling for other market segments). Wald’s account also makes sense of other matters that seem incomprehensible to modern music fans. Wald doesn’t discuss this, but we are often surprised that great singers of the past died in poverty and obscurity and are buried in unmarked graves (Bessie Smith, for example). But Wald’s emphasis on the contemporary importance of the song rather than the singer helps to explain how this could have happened. We might prize the iconic performances of the time, but back then there were lots of jobbing singers churning out multiple versions. Interesting enough to make me order a copy of Wald’s new book, _How the Beatles Destroyed Rock ’n’ Roll_.