[ad_1] Nowa­days musi­cians can reach hun­dreds, thou­sands, some­times mil­lions of lis­ten­ers with a few, usu­al­ly free, online ser­vices and a min­i­mal grasp of tech­nol­o­gy. That’s not to say there aren’t still eco­nom­ic bar­ri­ers aplen­ty for the strug­gling artist, but true inde­pen­dence is not an impos­si­ble prospect. In the 1950s and 60s, on the oth­er hand,…