Hello, Since one of missing features of nanopi2 board is audio in/out jack. I bought the following USB sound card which works prefectly on desktop Debian and Raspbian (for raspberry pi) boards. https://www.amazon.co.uk/gp/product/B008KGL2L2/ref=s9_zgift_hd_bw_bT8XD5_g147_i1/254-5352485-4084565?pf_rd...