for half notes and whole notes, you'll have to do it like this:
freq(^oA3,^oQR)
freq(^oA3,^oQR)
This will give you half notes.

This looks amazing!  Can't wait to see this finished

This does look pretty cool. I have always wanted a music editor for calc, and this does well. One suggestion though: Running the source of a program doesn't work

That explains why I typed "DUH" there
I realized it at that point

Cewl. For a rest do:
freq(oQR,oQR)
For a quarter note rest

Which wavelenght table did you use?

http://www.phy.mtu.edu/~suits/notefreqs.html

Cewl. For a rest do:
freq(oQR,oQR)
For a quarter note rest

Ok. I'll update it at the front page

So you can write music with this program trough notes?

I got something for you. Lets see if you can make it happen
Use a 16 bit wavelength table and put it in a list. Now each byte represents a certain tone.
Now make constants that refer to those notes.
1->oC
2->oCS
3->oD
4->oDS
5->oE
6->oF
7->oFS
8->oG
9->oGS
10->oA
11->oAS
12->oB
Now this is one note:
oD^(note),1^(octave),4^(1/lenght)
Put a lot of them in an array:
Data(oF,3,4,oE,2,4,oB,3,2 etc.Now loop trough this array to play all the notes
I hope you understand any of it