I'm not a linguist, but I think they could have done better with the Plosive "P" sound. It's too close to the "B". In Standard American English the P is more obvious than this.
The top of the page states that /p,t,k/ are non-aspirated. These sounds are always aspirated in English when word initial (in most if not all varieties of English). That means that the only difference between /p/ and /b/ here is vocal chord vibration of the latter, which is not what you expect to hear word initial as a "Standard American English" speaker.
https://en.wikipedia.org/wiki/Aspirated_consonant