Question: is b double flat an a?
Answer: Another name for Bbb is A, which has the same note pitch / sound, which means that the two note names are enharmonic to each other. It is called double-flat because it is 2 half-tone(s) / semitone(s) down from the white note after which is is named - note B. The next note up from Bbb is Bb / A#.