On the other hand, your picture tends not to inspire much confidence.
I hasten to point out that it's not my picture...
Alessandro Vezzosi, a Leonardo expert and the director of a museum dedicated to the artist in his hometown of Vinci, said he had not seen Pala's research but that the musician's hypothesis "is plausible."
Vezzosi said previous research has indicated the hands of the Apostles in the painting can be substituted with the notes of a Gregorian chant, though so far no one had tried to work in the bread loaves.
"There's always a risk of seeing something that is not there, but it's certain that the spaces (in the painting) are divided harmonically," he told the AP. "Where you have harmonic proportions, you can find music."
Indeed, it certainly seems fair enough that he might have hidden something away in there. Now what would be interesting would be if it were some known piece of appropriate and/or enlightening chant, for example.