8vb clefs on grand staff don't effect playback?

[pianoleo]

@mhcoffin

But those folks don’t use octave clefs, do they? The interpretation of octave clefs shouldn’t make any difference at all unless you actually use them, right? (If there are lots of folks that badly want to use octave clefs for those instruments, then I’m just wrong.)

Here we are:

Gould specifies that octave clefs may be used for piccolos etc., and prescribes that octave clefs should not be used for instruments that don’t always transpose an octave.