8vb does specifically mean an octave below, but I find that it's a pretty archaic usage, particularly in the theatre.
Here's a link to some musicians discussing it.
I find more scores use 8va for both above or below, sometimes specifying which direction (but the Barfee stuff is so full of initials specifying who sings which part, there's not really room for that).
But Fogler, who was singing the role when the published score was finalized, is definitely not singing in Logan's octave on the recording.
8va/8vb discussion
Updated On: 4/9/13 at 04:42 PM