Android Signal analysis + some filters

Question

as the world cup is the main sport event and the Vuvuzelas are the most annoying sound in the world, I had an idea to remove them definitively by reading this new ( http://www.p

Answer 1

Great question!

I don't see the line-in connector listed explicitly as an audio source option but perhaps you might want to start by getting data from the microphone source to get your code working, then find a way to obtain audio from the jack.

For the Fourier analysis/translation you may also consider this stackoverflow question

Answer 2

Well, if you want to filter fixed frequencies (233 hz, 466 hz, etc.) you should look also to other forms of digital eq-filtering. Doing through the FFT will use a lot of processing, and will make a real-time application became really heavy. On this website there is some directions on the mathematical ideas behind other filtering methods: http://mysite.mweb.co.za/residents/cyb00746/audiodocs/Digital_EQ.htm