Making MIDIs!

I found this really really cool place online. Link: the Link

Go there, and, if you want an example of how this works, go to there and in one of the "music score" boxes enter the centered blue text.

a@ba@<>b>a>b@>a@g@f#@g>a@g@f#@e@dbdeg>a>b->a@g@e>a>a@>b@[ad--]

Now! Click "generate" and play the song. This is supposed to be "Eleanor Plunkett", a song by the blind harpist and composer Turlough O'Carolan. It is way to fast, and also has a really fast end part--I don't know how that happened! If anyone knows what to enter in the "tempo" box, please leave a comment on how to make it really slow. (Hint: choose "dulcimer" in the instrument section because that's kind of like a harp) I'm working on fixing it, and I think it would be fun to figure out how to make a cool honest-to goodness MIDI.
Saro