We poll the CCD temp about once per second. That should, in no way, even get close to saturating the slowest buss on your system, A LPT port should be able to handle that poll rate with ease. Most audio devices have a (low) sampling frequency of 44khz at 32bit So a 1hz sample rate (at likely a good deal less than 32 bit) should be near nothing.
Thanks,
Jared