[linux-audio-user] S/PDIF capture with m-audio 2496

Could anyone please give me a step-by-step guide to setting up my m-audio 2496 to capture from the S/PDIF? I am trying to record into either Audacity or Ardour, but cannot 'find' any sound. I can route data using Envy24Ctrl so that the digital mix bars on the L/H side are active, but cannot capture sound using applications. I'm guessing therefore that alsa is set up incorrectly. Using Audacity, under Edit->Preferences, only /dev/dsp is visible (I cannot select any other interface). Recording just produces a flat line. In Ardour (via jack), I cannot get anything to appear on the v/u bars despite selecting alsa_capture1 & 2. The interface works fine in winXP, so it's something I'm doing wrong. So, can anyone help me to get the sound from my interface to audio applications? Thanks, Rob Jackson