Rock/linein

1 Line in signal connect

   Line in signal can connect to rock pro/lite extend port J8  PIN  5/6.  

2 Select capture from mic / line in

   echo 1 > /tmp/rk1000_input_sel    #RK1000 capture from mic
   echo 2 > /tmp/rk1000_input_sel    #RK1000 capture from line in

3 Tested module

   http://detail.tmall.com/item.htm?spm=a1z10.3-b.w4011-3079905380.27.SocVjO&id=42576261888&rn=b482a0f48f9bab9ef1f5e1ffb433daed&abbucket=7#