Well Sott, you didn't asked for it, but my old casio only interprets the No3 chord, and if I am correct, it interprets it as an
A something sus4.

The same chord sounds when you press A1-D2-E3, and it doesn't sound like an E or C to me at all.

I know nothing of music theory, wish I had the patience to learn, but the "feeling" i get from this chord is an A, definitely not an E or C. I only know a song that uses it, and spent maybe 2-3 days trying to pick this chord by ear, the progression is Dm, this chord and Am.
I would happily mail the original mp3 and the 4 poly ringtone I made for my Nokia to anyone who would like to hear what I mean.