SigmaStudio控件Cross Mixer\Signal Merger算法效果分析

衰减与叠加混音算法验证分析一
CH2:输入源为-20dB正弦波1khz
CH1叠加混音：参考混音算法https://blog.csdn.net/weixin_48408892/article/details/129878036?spm=1001.2014.3001.5502
Ch0衰减混音：外部多个输入源做混音时，建议参考该算法控件（以免有失真风险），参考混音算法连接

https://blog.csdn.net/weixin_48408892/article/details/129877146?spm=1001.2014.3001.5502

衰减与叠加混音算法验证分析二

理论计算dB值

CH0:

float out1=-20.67f;

float out2=-10.69f;

float out1f=pow(10, out1/20);

float out2f=pow(10, out2/20);

float merge=(out1f+out1f+out1f+out2f)/4;

float mergeout=(float)20log10(merge);
即理论值：-16.926633dB
CH1:
float mix=(out1f+out1f+out2f);
float mixout=(float)20 log10(mix);

即理论值：-6.425418dB

CH2:-20dB

CH3:-10dB

实际测量dB值

CH3：实际-10.69dB,如下图
CH2:实际-20.67dBCH1:实际-6.42db与理论计算值一致
CH0:实际-16.92dB---与理论计算值一致