I have bought DSP Controller (RZNC-501). I use flash disk to run my U-files. I found out that there is a USB slot at the bottom, I tried to plug it with a usb cable, and windows started to look for the software, but i don't have any software for it. Does anyone have the driver or host program of the RZNC-501? just in case there is one, i think it would be more convenient to use it rather inserting the usb flash disk.