filter wavs by average loudness in csharp

To filter WAV files by average loudness in C#, follow these steps:

Import the "NAudio" library to access audio data in C#. You can do this using NuGet Package Manager.
Load the WAV file you want to filter using the AudioFileReader class from the NAudio library.


main.cs
string filePath = "sample.wav";
AudioFileReader audioFile = new AudioFileReader(filePath);
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Calculate the average loudness of the WAV file using the MaxSampleAggregator class from the NAudio library.


main.cs
MaxSampleAggregator maxSampler = new MaxSampleAggregator();
maxSampler.Init();
audioFile.CopyTo(maxSampler);
float maxSampleValue = maxSampler.MaxSample;
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Check the loudness level of the file. You can set the threshold level as per your requirement.


main.cs
float averageLoudness = 20 * (float)Math.Log10(maxSampleValue / 1f);
float thresholdLoudness = -10.0f; // set your own threshold value
if (averageLoudness > thresholdLoudness)
{
    // File is too loud, do not filter
}
else
{
    // File volume is below the threshold, apply your filter
}
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Finally, you can apply your filter to the WAV file if it passes the loudness threshold.


main.cs
if (averageLoudness > thresholdLoudness)
{
    // File is too loud, do not filter
}
else
{
    // File volume is below the threshold, apply your filter
    // apply your filter code here
}
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Note: Different audio formats may have different amplitude ranges. It is recommended that one should have a thorough understanding of audio file formats to process audio data effectively.

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