This was published today in Comment, the daily publication of Cardus:

Just before the dawn of the recording industry, popular songs were sold to the North American public in a format requiring of customers more musical literacy. When Let Me Call You Sweetheart and Down by the Old Mill Stream were published in 1910, their popularity was judged by sales of sheet music, and not yet by the records that would come into their own during the interwar years. Yes, people would attend performances of these songs by local bands and choirs, but they were more likely to gather round the upright piano at home and sing them together. People had to make their own music rather than rely on others to make it for them. Obviously not everyone had professional-quality voices, but that didn’t matter. Young and old alike sang their hearts out.

Although I was born well into the recording age, I grew up in a family that sang with gusto at the slightest provocation. We had two pianos in our house, and everyone played at least one musical instrument. We were raised on the old movie musicals by Rodgers and Hammerstein, Lerner and Loewe and, of course, Meredith Wilson, whose score for The Music Man harked back to that earlier era just before the outbreak of the Great War. In fact, so many times did we play The Music Man soundtrack that scratches eventually caused the record to skip. (If you were raised on CDs, ask your parents or grandparents what that means.) The notion of Julie Andrews breaking into song in the course of her day did not strike us as the least bit unusual.

Where did all this come from? Read more here.