I see my sax thing had a couple of 'likes', so here's the file if you want to have a look. The sax samples should be embedded. I know that other people's code is a hassle, but I've commented it. There's often a little code snippet you can pinch - it's how I learn Python.
https://www.dropbox.com/s/pmrdr2j13jqnu03/saxthing.zip?dl=1
@Cerbera I only have the cut down Cubase Elements, but for £75 it's an amazing bit of tech. Thrown in a cheap usb keyboard, a low latency sound card and say Addictive Keys and you've got a 50 grand Steinway in your council flat.