Like Steve says, it will not give the effect you want. This trick works on a pipe organ, but not on a piano.
I think the reason for this is the pattern of partials (overtones) that a pianostring gives. The organ pipes (used for this kind of effect) are flutes with very few overtones, similar to sine wave. In contrast, a pianotone has a lot of overtones in a complex pattern. The overtones will conflict with each other creating a very dissonant noisy sound.
I once analysed and used the 27 strongest partials of the low A of a grand piano in a composition. Here are the partials, transcribed to notes:http://karstein.djupdal.org/wp-content/uploads/2014/02/akkord-til-pianospill.gif
There are some interesting things to note (and these things are well known in piano acoustics):
-- The pianotone gives a rich spectre with a lot of overtones
-- the 1st and 2nd partial are not present (at least not strong enough). Meaning when you play the low A you dont actually hear the fundamental of the note, only the overtones
-- The spectre is inharmonic, meaning a pianotone is actually dissonant in itself