brendakiddle

Hi, i have a Mac Pro, running OSX El Capitan. I purchased the Sonic Port VX , the outputs are connected to my active monitor speakers. When i start my Mac, system sound is completely off, then i start e.g. Garageband and press play, it seems that the volume is set automatically to full. When i move the volume slider in the menu bar a little, everything is fine. Anyone the same problem?