App idea, Any idea on implementation?

[Dr Mephesto]

thanks for the pointers!

I just found a program that does more or less what I want, but I would
still like to have a go myself. The link is: http://www.akoff.com/music-composer.html

I gave the program a go, as there is a free trial. I found that it had
a hard time doing the conversion (or I am a really bad whistler),
maybe there is room for improvements.

So, I know it can be done, the question is, does Python have to power
to do it? And how did they actually do it anyway...