Hi. I have implemented the Nexys Video looper demo, according to the manual, following all the steps. Unfortunately, after implement and configure the FPGA, using Vivado, the demo did not work properly, the LCD works perfectly, also the control buttons, but the sound did not appear in line out, with the headphone connected. If someone knows especial details in order to use line in and line out, different to the especified in the guide, please let me know, also if someone have implemented this demo succesfully. Thanks in advance.