How can change frequency of audio file

[kishanpatel]

So, i am trying to use Interpolation. But still not succeed to change sample rate. I have also check some examples. I am sharing one link which also used.

Resampling Audio using Lagrange Interpolator

Hi, I am trying to re-sample audio using juce_LagrangeInterpolator. Could anyone please point to the juce example that explains how to use it the right way? Thanks.

I also uploaded some lines of code which I modified to change sample rate.