File:Inharmonic additive synthesis.ogg
Inharmonic_additive_synthesis.ogg (Ogg Vorbis sound file, length 10 s, 173 kbps, file size: 211 KB)
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| Description |
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;
}
|
| Date | |
| Source | Own work (Original text: Self-made) |
| Author | Chrisjohnson (talk) |
| Permission (Reusing this file) |
Creative Commons Attribution-ShareAlike |
Licensing
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This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: Chrisjohnson at English Wikipedia
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Original upload log
Transferred from en.wikipedia to Commons by FSII using CommonsHelper.
The original description page was here. All following user names refer to en.wikipedia.
- 2012-01-16 00:03 Chrisjohnson 0×0× (216245 bytes) {{Information |Description = A sound created by inharmonic additive synthesis |Source = Self-made |Date = 2012-01-14 |Author = [[User:Chrisjohnson|Chrisjohnson]] ([[User talk:Chrisjohnson|talk]]) |Permission = Creative Commons Attribution-Sh
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:47, 9 February 2012 | 10 s (211 KB) | Upload Bot (Rich Smith) | {{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|A sound created by inharmonic additive synthesis. Generated by the following C++ source code (compiled |
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