/// <summary>
/// Constructs <see cref="DynamicsProcessor"/> in given <paramref name="mode"/>.
/// </summary>
/// <param name="mode">Type (mode) of dynamics processor</param>
/// <param name="samplingRate">Sampling rate</param>
/// <param name="threshold">Compression/expansion threshold</param>
/// <param name="ratio">Compression/expansion ratio</param>
/// <param name="makeupGain">Makeup gain</param>
/// <param name="attack">Attack time (in seconds)</param>
/// <param name="release">Release time (in seconds)</param>
/// <param name="minAmplitudeDb">Min threshold for dB amplitude</param>
public DynamicsProcessor(DynamicsMode mode,
int samplingRate,
float threshold,
float ratio,
float makeupGain = 0,
float attack = 0.01f,
float release = 0.1f,
float minAmplitudeDb = -120 /*dB*/)
{
_mode = mode;
_fs = samplingRate;
_envelopeFollower = new EnvelopeFollower(_fs);
_minAmplitudeDb = minAmplitudeDb;
Threshold = threshold;
Ratio = ratio;
MakeupGain = makeupGain;
Attack = attack;
Release = release;
}
/// <summary>
/// Method for extracting the envelope of a signal
/// </summary>
/// <param name="signal">Signal</param>
/// <param name="attackTime"></param>
/// <param name="releaseTime"></param>
/// <returns></returns>
public static DiscreteSignal Envelope(DiscreteSignal signal, float attackTime = 0.01f, float releaseTime = 0.05f)
{
var envelopeFollower = new EnvelopeFollower(signal.SamplingRate, attackTime, releaseTime);
return(new DiscreteSignal(signal.SamplingRate, signal.Samples.Select(s => envelopeFollower.Process(s))));
}