如何录制实时流音频 苹果手机

Question

I am working on a radio app. I am recording that live audio stream through AVAudioQueue but problem is it records outer noise as well. I want a way to remove that outer noise. I just want to record that stream only. Please help me. I am stuck on it.

Answer 1

Try to use lowpass/highpass filters to filter the data you get. You can take a look at AccelerometerGraph sample code from Apple, to see how they implement these filters. You you adjust filters properly you probably can get rid of some noise.