Do you pronounce stable and staple identically?
stable - definition of stable by the Free Online Dictionary, Thesaurus and Encyclopedia.
staple - definition of staple by the Free Online Dictionary, Thesaurus and Encyclopedia.
The "p" should not sound like a "b" as it does in "speak" as you correctly identified. Nor should the "b" sound like a "p".
Stable and staple should be easily differentiated when spoken.
You are right. I was misled by the initial link. I have found another link that pronounces staple's p as the original sound [p]. Thank you.