con 8va

It might be a British vs American thing. growing up under the British system, I learned 8vb in the 60s, from a little red book called, “Rudiments And Theory Of Music”.
Screen Shot 2019-01-10 at 7.24.11 AM.jpg
I actually heard about 8ba for the first time, in 2000, and thought the person had made a mistake. He was studying at Long Island University, at the time.

History unfolds. :slight_smile:

FWIW, I’ve seen con 8ve, con 8va, con8vb, coll 8va, and 8 on its own, all to mean double an octave down. The ‘8’ on its own under a note is sufficient for a pianist to double it without confusion.