"Late last year, Zoe Keating, an independent musician from Northern California, provided an unusually detailed case in point. In voluminous spreadsheets posted to her Tumblr blog, she revealed the royalties she gets from various services, down to the ten-thousandth of a cent. Even for an under-the-radar artist like Ms. Keating, who describes her style as “avant cello,” the numbers painted a stark picture of what it is like to be a working musician these days. After her songs had been played more than 1.5 million times on Pandora over six months, she earned $1,652.74. On Spotify, 131,000 plays last year netted just $547.71, or an average of 0.42 cent a play. 'In certain types of music, like classical or jazz, we are condemning them to poverty if this is going to be the only way people consume music,' Ms. Keating said. ... The question dogging the music industry is whether these micropayments can add up to anything substantial. 'No artist will be able to survive to be professionals except those who have a significant live business, and that’s very few,' said Hartwig Masuch, chief executive of BMG Rights Management."