public SampleAggregator(int fftLength)
{
if (!IsPowerOfTwo(fftLength))
{
throw new ArgumentException("FFT Length must be a power of two");
}
_m = (int)Math.Log(fftLength, 2.0);
_fftLength = fftLength;
_fftBuffer = new Complex[fftLength];
_fftArgs = new FftEventArgs(_fftBuffer);
}
private void FftCalculated(object sender, FftEventArgs e)
{
var freq = e.Result.Take(e.Result.Length / 2).Skip(1).Select(c => Math.Sqrt(c.X * c.X + c.Y * c.Y)).ToList();
var max = freq.Max();
var freq2 = freq.Select(x => x / max).ToList();
var beat = false;
//for (int i = 0; i < 10; i++)
{
if (freq2[0] > 0.8)
{
beat = true;
}
}
if (beat)
{
counter++;
}
//TbCounter.Text = String.Format("{0} beats", counter);
}