/// <summary>
/// In-place signal attenuation by coeff
/// </summary>
/// <param name="signal"></param>
/// <param name="coeff"></param>
public static void Attenuate(this DiscreteSignal signal, float coeff)
{
if (Math.Abs(coeff) < 1e-10)
{
throw new ArgumentException("Attenuation coefficient can't be zero");
}
signal.Amplify(1 / coeff);
}
/// <summary>
/// Normalizes <paramref name="signal"/> by its max absolute value (to range [-1, 1]).
/// </summary>
/// <param name="signal">Signal</param>
/// <param name="bitsPerSample">Bit depth</param>
public static void NormalizeMax(this DiscreteSignal signal, int bitsPerSample = 0)
{
var norm = 1 / signal.Samples.Max(s => Math.Abs(s));
if (bitsPerSample > 0)
{
norm *= (float)(1 - 1 / Math.Pow(2, bitsPerSample));
}
signal.Amplify(norm);
}
/// <summary>
/// In-place signal attenuation by coeff
/// </summary>
/// <param name="signal"></param>
/// <param name="coeff"></param>
public static void Attenuate(this DiscreteSignal signal, float coeff)
{
Guard.AgainstNonPositive(coeff, "Attenuation coefficient");
signal.Amplify(1 / coeff);
}