[RTTY] A Question for Chen... Soundcards?

[Michael Haack via RTTY <rtty@contesting.com>]

Chen,

I had a brief question the other day that I had bounced off Don, AA5AU.
We both figured you were the guy for this.

I can't recall if you've ever addressed the issue but here it is.
Is there a decided advantage to using a high powered external sound card 
vs the internal card for RTTY/MMTTY/2tone use?
Or is it just a waste of horsepower (so to speak)

I would tend the think the more important number would be the S/N floor 
and Dynamic Range of the respective cards, as opposed to their DSP 
capabilities.
Thoughts?

Thanks, 73
Mike WB9B
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