How to turn screen off

[erockvr6]

when i'm streaming pandora, i would like to turn the screen off, to save battery, all that happens is the backlight turns off after 40 secs per the settings, and if i hit the power button on top it stops streaming. i am on sprints stock rom, waiting for juicy 9, and i remember with custom roms i could hit the power button and it would keep streaming. any suggestions?