The b's in the audio of this sentence are being inappropriately aspirated. If I represent aspiration with ^, the sentence sounds like qab^mo' nab^chaj luj nIHwI'pu'. The aspirations should be removed.
I find aspiration of syllable final b to be appropriate.
It's not one of the consonants that TKD tells us is aspirated.
It's currently affected by a distortion we can't control. Once Duolingo figures that out, I'll probably have to rerecord this one anyway. I'll try not to overemphasize as I do so.