Deltas ,
Yeah.
yeah. So.
I  I mean , I think the other thing that one  I mean , this is , I think a good thing to do , to sort of look at these things at least  See what I 'd  I 'd  Let me tell you what I would do. I would take just a few features. Instead of taking all the MFCC 's , or all the PLP 's or whatever , I would just take a couple.