You're not recording in 64 bit.
the software is operating in a 64 bit space which is different.
Audio CD's are 16 bit @ 44.khz sample rate
HD DVD's are 24 bit @ 48khz sample rate
Internal processing of audio data can be set at 32 or 64 bit floating point which means that the resolution is calculated to a finer degree. This is not any audio that we canhear. there are not yet any convertors that allow us to hear better than 24 bit.
i'd be more worried about using a soundblaster card as they are more designed for playback than recording. doesn't mean you can't but if you look at the connectors alone it should tell you that no pro gear, not even a basic microphone can connect to it.
If you're in a position to ditch it in favor of another card you'd be much better off.
If not then you'd be best served by setting it 24 bit at 44.1 or 48 khz for your recording.
The convertors on the Audigy are just not going to give you any better sound whether you use 48 or 96 khz. the only thing is at 96k you'll be using more than double the hard disk space than 48k.
can I suggest you do some reading on audio bit rates and sample rates so that you get some basic understanding of the terminology and at least a laymans's understanding. you got lots to learn. All the best.
You haven't mentioned anything about your audio gear. If you have a look many of us put those details in our signature as it is helpful when asking questions
post edited by mudgel - 2011/03/31 05:58:33