You'll want to use bitstream to allow Dolby Digital and DTS signals to pass directly to the 950. PCM is an option to allow support for digital connection to receivers that lack Dolby Digital or DTS, but bitstream is what you want to use to allow the player to send the audio data directly from the disc to the 950. Your DVD player will revert to PCM for CD playback (put a CD in while using a digital input to the 950 and when the 950 acquires the signal it will temporarily display "PCM" in the top right corner of the display).

Side note: many players default to PCM for DTS so that non-DTS receivers will work if a DTS track is selected -- anybody wanting to use a DTS decoder have to switch the player's output to bitstream.

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