I don't believe I ever heard of a psaltery before.
Must be like "Psalt" & battery all mixed up.
Or maybe "if you spill the psalt it's better luck if you throw it over your left shoulder"
The one instrument i could never stomach was a Hammond piana. (whomp what a tick tick, whomp what a tick tick)
That was just my impression.
I like keyboards. But I never was much enthused about that one.