Standard cylinder records could hold about 2 minutes of audio. The larger Columbia Twentieth Century was one approach to breaking that limit. The Edison Company chose instead to pack the grooves closer together. With the Amberol, Edison doubled the density of grooves to 200 per inch, thus allowing four minute songs. The record was meant to be played at 160 rpm—“not faster or slower.”

“Who Will Care for Mother Now?” was a very popular song from the Civil War written in 1863 —the sheet music sold more than ½ million copies. Here's the chorus:

Soon with angels I'll be marching
with bright laurels on my brow;
I have fallen for my country,
who will care for mother now?