How to detect sound frequency / pitch on an iPhone?

iphone audio frequency pitch
Piotr Usewicz picture Piotr Usewicz · Nov 8, 2009 · Viewed 11.4k times · Source

I'm trying to find a way to detect sound frequency being recorded by iPhone's Microphone. I'd like to detect whether the sound frequency is going up or down.

Answer

Morion picture Morion · Nov 8, 2009

you can try to use SCListener. It's a small open-source class and very easy to use

EDIT: The formatter does not like the _ in the name. Here is the link. http://github.com/stephencelis/sc_listener

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