Turning off visible dynamics on lower piano staff

[Doug Ewell]

First-time poster, so please be gentle.

I have an original piano score, just 50 measures long but with volta 
repeats and alternate endings and a coda, which I am relying on to 
create both the PDF and the MIDI output.

I'd like to display the dynamics between the two staves, but the "piano 
centered dynamics" example in the documentation looks like it might not 
work for this piece, because of the alternate endings and such.  And I 
can't simply use \f and friends in the upper staff only, not the lower, 
because the MIDI wouldn't come out right.

Is there a simple way to turn off the dynamics engravers for just the 
lower staff?

--
Doug Ewell | Thornton, Colorado, USA | http://www.ewellic.org
RFC 5645, 4645, UTN #14 | ietf-languages @ is dot gd slash 2kf0s ­