I suspect trying to reduce the jitter in a USB keyboard response could be frustrating.
I have some experience conducting experiments that are structurally similar to this. To really be accurate, how about using a piano keyboard, or some other physical sound-producing device. For each test record a stereo track of the whole test. On one channel, use a microphone to record the stimulus that the subject is hearing. On the other channel, record the output of whatever device the subject has been instructed to use.
Sep 10, 2013 at 7:20am #264843