Our lab collected a large amount of word naming latencies using Direct RT 2012 and a headset microphone. The computers are newer Dell desktop units. Problem is there is a clear evidence +/- 30 ms buffering going on in the sampling. Any ideas how this could come about, its as if we were using 1980's equipment. See attached histogram.
The only thing I have come up with is perhaps my students have plugged the mic into the front of the PC, and perhaps that jack does not use the main sound card? Otherwise, I have no clue. Please help!