Hi, I was wondering if someone can help me please. I am trying to use an external USB DAC with my sp1000m but whenever I connect the USB DAC I get no sound, even after enabling the USB audio function on the external USB option in notification panel. Could the issue be that I need to disable MTP mode to enable DAC input mode? See the attached picture, how do I get that green arrow to move from MTP to the DAC Input option? It's not allowing me to do that when my external USB DAC is connected. I'm able to adjust volume from the USB DAC but I can't get any sound from it. I've tested the USB DAC with another device and it works fine so there's no issue on that front. Any ideas regarding what the issue is, please?