Noise Reduction

[zxhfirefox]

I am new to AudioKit and nearly know nothing about DSP, I currently work a project which needs to record speech, which needs to reduce the noise.

I google this topic and find some ways to implement it and read some articles.

On the internet, I found there are two ways to do it, first is get noise profile, then use it to reduce noise; second, to build a noise gate.

I can not figure out what is better and what is easier to implement.

Basically, I think I need to do follow things to implement a very basic noise reduction.

1. record some silent audio, which will contain the noise.

2. use FFT to find out the frequency of the noise.

3. use a filter, high pass maybe,  to remove the noise from actual speech.

Is this correct way to do with AudioKit? 

If this is an OK or correct way to do, then I have another question with FFT.

I use AKFFTTap to get fftData, but what does the data mean? how should I use these data to figure out the frequency of noise ?

Thanks.

[Mark B]

I'm wondering if AKConvolution can be used for this if you give it a sample of the inverted noise? Just a wild guess.

[Paul Batchelor]

We don't have any real noise reduction utilities. You could try using AKEqualizerFilter or AKBandRejectFitler to filter out noise if you know the frequency ahead of time. 

Good luck,

-P

[zxhfirefox]

Thanks for the tint, I will try.
在 2017年8月4日星期五 UTC+8上午1:14:25，Paul Batchelor写道：