Sample Programs / Songs and Voice Exercises

[CricketB]

Hello,

Are there sample programs / songs I can look at, to see how easy it is
to program a simple tune?

I'd like to program each voice exercise once and have the program
transpose it to a random key, so I can concentrate on voice and ear
training rather than piano playing. My brain knows the associated
theory, but my fingers don't.

Also, can I specify the octave? I need to work on my entire range, but
not outside it.

Thanks in advance,

Cricket