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我录制了一个弹奏吉他弦的音符,然后拿出每个和声的振幅,并通过prgram(android)重新创建类似的声音,但声音不响很像吉他。通过原始音频再现吉他弦与和声
public void setToHarmonies(int[] harmonies, int frequency){
int total = 0;
int size = harmonies.length;
for(int i=0; i<size; i++){
total+=harmonies[i];
}
for(int i=0; i<numSamples; i++){
samples[i] = 0;
}
float[] effHarm = new float[size];
double[][] hwaves = new double[size][numSamples];
for(int i=0; i<size; i++){
effHarm[i] = ((float)(harmonies[i]-.2))/(float)total;
hwaves[i] = genSinWave(numSamples, frequency * i);
for(int e=0; e<numSamples; e++){
samples[e] += effHarm[i] * hwaves[i][e] * Math.exp((float)((float)e/(float)15000) * -1);
}
}
}
public double[] genSinWave(int size, int freq){
double[] samplesOut = new double[size];
float period = (float)sampleRate/(float)freq;
for(int i=0; i<samplesOut.length; i++){
samplesOut[i] = Math.sin(2 * i * Math.PI/period);
}
return samplesOut;
}
private static final int[] guitar = {699, 602, 465, 407, 544, 457, 443, 307, 283, 357, 342, 224};
上无畏的频谱图给我性否定值,最低为-72.7,所以我从72.7减去的值在每一个峰值,然后乘以10来获得上述值。编程错了吗?和声内容/音色值是否错误?是否没有办法让它发出吉他音,而不对波做出特定的攻击和衰减修改?所有的帮助表示赞赏。
那么'int []吉他是否意味着每个谐波的电平? – jaket 2014-12-10 23:36:43
是的。由于我除以“总数”,我认为他们只需要处于正确的比例。对? – 2014-12-10 23:42:04
是的,这是正确的。你有没有看过Karplus-Strong算法? http://www.cs.princeton.edu/courses/archive/fall07/cos126/assignments/guitar.html – jaket 2014-12-10 23:51:14