There are not that much of online radios available for their listeners that are playing live musical shows for their listeners. There are some that occasionally plays live musical programs but very few of them actually is full time live music based radio like MDR Sputnik Soundcheck Channel.
MDR Sputnik Soundcheck Channel official website address is /www.sputnik.de
Popular Germany Radio:
Rock The Folk
Radio Evangelist Bright
100 Top Schlager