Thanks for the tip! I was connecting like you did but could not get any signals. Found out that a few voltage inputs just did not work with this amplifier. Now I get the input, but it jumps all over the place. When it is expected to be 2.5V, the controller gives us 2.2-2.7V. Check the ground connections and other bits and pieces, but could not find out why it is happening. In any case, thanks for the reply.
Customer support service by UserEcho