I don't know what MP3 you are talking about but if you are referring to the Conductor output then yes, it is Stereo. As for these nodes, the current and voltage is within spec for a 20 piece string for the SSC but you may have an issue with the WS8211 chip. If you are using the V4 SSC and these chips are clocked correctly, then they may ork just fine. I would order a test string to see before ordering a large number of them.