Mm - hmm.
and even echo cancellation is going to uh be something  It may  you  Someone may be moving enough that you are not able to adapt quickly and so the tack that we 've taken is more " lets come up with feature approaches and multi - stream approaches and so forth , that will be robust to it for the recognizer and not try to create a clean signal ".
Mm - hmm.
Uh , that 's the party line. But it occurred to me a few months ago that uh party lines are always , you know , sort of dangerous. It 's good   good to sort of test them , actually. And so we haven't had anybody try to do a good serious job on echo cancellation and we should know how well that can do. So that 's something I 'd like somebody to do at some point , just take these digits , take the far - field mike signal , and the close uh mike signal , and apply really good echo cancellation. Um , there was a  have been some nice talks recently by  by Lucent on  on their b