Inharmonic_additive_synthesis.ogg (Ogg Vorbis sound file, length 10 s, 173 kbps, file size: 211 KB)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
|
This file was moved to Wikimedia Commons from en.wikipedia using a bot script. All source information is still present. It requires review. Additionally, there may be errors in any or all of the information fields; information on this file should not be considered reliable and the file should not be used until it has been reviewed and any needed corrections have been made. Once the review has been completed, this template should be removed. For details about this file, see below. Check now! |
| 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
Chrisjohnson at English Wikipedia, the copyright holder of this work, hereby publishes it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: Chrisjohnson at English Wikipedia
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
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
Click on a date/time to view the file as it appeared at that time.
| 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 |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
Global file usage
The following other wikis use this file:
- Usage on ja.wikipedia.org