When I play a multi-channel SACD, and select the 6 channel bypass, I do not get multi-channel sound unless I first select a surround format (DPL II or Dolby Digital for example) before hitting the bypass input. I know these do not affect the analog inputs, but if I don’t, I only get two channel output. It does not matter what source I use to select the surround format, in fact I even used the FM tuner to make this work. The manual does not mention having to do this, is this correct?