English: A sound created by inharmonic additive synthesis. Generated by the following C++ source code (compiled with GNU g++ version 4.5.2 with libsndfile 1.0.23.)

#include <sndfile.h>
#include <cmath>
#include <algorithm>
using namespace std;
double Amplitude(int k, double t)
{
return 0.01*((10-t)*(1.0/double(k)) + 0.2*t*(k%2));
}
double Frequency(int k, double t)
{
return 0.1*(220*(k+0.1*t*t*sin(k*t))*(10-t) + t*587.0);
}
int main()
{
double sr=44100;
int nFrames=int(sr)*10;
double *buf = new double[nFrames];
double t=0, dt=1.0/sr;
int K=44;
double *phase=new double[K];
for (int k=0; k<K; k++) phase[k]=0;
for (int n=0; n<nFrames; n++)
{
buf[n]=0;
for (int k=1; k<K; k++)
{
buf[n]+=Amplitude(k,t)*sin(phase[k]);
phase[k]+=twopi*Frequency(k,t)*dt;
}
t+=dt;
}
SF_INFO sfinfo;
sfinfo.samplerate=sr;
sfinfo.channels=1;
sfinfo.format=SF_FORMAT_WAV|SF_FORMAT_PCM_16;
SNDFILE *out = sf_open("inharmonic.wav", SFM_WRITE, &sfinfo);
sf_writef_double(out, buf, nFrames);
sf_close(out);
delete [] buf;
delete [] phase;
return 0;
}