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Editorial Team
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Asked: 2026-05-12T22:16:58+00:00

I am writing raw audio bytes from two files into a new wav file

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I am writing raw audio bytes from two files into a new wav file to combine the two files. The resultant file which is created has the contents of both the audio clips but there is also a lot of noise in the file.

Can someone point me to a good example which shows how to write raw audio bytes to a file? Here’s the basic logic that I am following

SInt32 leftSample1 = ReadSampleFromFile1(music_iter1);
leftSample1 = (SInt32)((float) leftSample1 * 0.7071); //to avoid clipping

SInt32 leftStereoSample2 = ReadLeftSample(music_iter2);
leftStereoSample2 += leftSample1;
if (leftStereoSample2 > 32767)
leftStereoSample2 = 32767;
else if (leftStereoSample2 < -32768
leftStereoSample2 = -32768;
// write leftStereoSample2 to the file
//do the same as left sample to right sample also

++music_iter2;
++music_iter1;

Thanks.

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1 Answer

  1. Editorial Team

    how many times are these returning true?

    if (leftStereoSample2 > 32767)
leftStereoSample2 = 32767;
else if (leftStereoSample2 < -32768
leftStereoSample2 = -32768;

    just because you are not clipping, (because you are forcing it not to) does not mean you wont get artifacts (distortion) etc when you truncate the waves like that. i would see how often that was happening.

    core audio has mixers. smart people have written code to deal with this kind of stuff already, so we dont have to 🙂 MultiChannelMixer is one that does stereo mixing. check it out.

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