Nevermind. I've seen it works.
By the way, if anyone ever needs an Android implementation of IWavePlayer, some dude in GitHub made one:
https://gist.github.com/neilt6/6d07322070470536ea0ba409c343c2a5
using NAudio.Wave;
var outFile = @"C:\Temp\NAudioMP3Test\NAudioTestWAV.wav";
var inFile = @"C:\Temp\NAudioMP3Test\NAudioTestMP3.mp3";
using (var reader = new AudioFileReader(inFile)) {
try {
WaveFileWriter.CreateWaveFile(outFile, reader);
} catch (Exception ex) {
Console.WriteLine(ex.Message);
}
}