Analyze “whistle” sound for pitch/note

Question

I am trying to build a system that will be able to process a record of someone whistling and output notes.

Can anyone recommend an open-source platform which I can use

Answer 1

If you use Java, have a look at TarsosDSP library. It has a pretty good ready-to-go pitch detector.

Here is an example for android, but I think it doesn't require too much modifications to use it elsewhere.