It would have been too nice: connect the iPod via RCA with an external sound card and charge at the same time via USB. If you connect the USB to a PC, the iPod begins to charge or shows "Do not disconnect" to. In this condition, one can not use it. If you put the USB into a USB charger that plugged into the socket, first everything goes as hoped. Ipod loads and plays simultaneously. But unfortunately is heard in this operating state a clear and humming Fiepsen. I suppose the cables are not properly shielded. In addition, the connector is slightly hakelig for the iPod, the quality is not the greatest. I send the item back.