Something that might be a little misleading on the audigy 2 NX spec sheet:
The spec sheet for the NX lists "S/PDIF format input signal of up to 24-bit/96kHz quality"...this is NOT what is able to be achieved via the input labelled "s/pdif in" on the card ...the toslink input on the NX is only capable of absorbing a 44.1 khz stereo signal. The company says it's for "minidisk only", but that information isn't on the product home page, you'll have to get a copy of the instruction manual to find that. The card cannot take input of a 5.1 channel ac3 stream from an external dvd player via toslink, for example, and decode it for output on its analog connections. The older extigy could, the NX cannot. This makes the NX a poor choice for those who wish to decode 5.1 from, say, an XBox 360 or Playstation 3, or a stand-alone DVD player, or anything other than a stereo source. Creative says it's a bandwidth problem, I think it's because they want to sell you "Platinum Edition" PCI cards with cheap, high-margin riser boards for the added capability.
Otherwise, the card CAN do 5.1-7.1 from an ac3/dts source internal to the computer via usb, or dvd-audio up to 96khz in 5 channels from an internal source via usb, or downsampled stereo for higher bitrate dvd-a from an internal source via usb. The NX can also pass a dvd bitstream from internal to the PC to an external decoder...it just can't grab an external dvd bitstream and decode it.



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