Onset Gate
Overview
onset_gate is a specialization of noise_gate with provision for gating out slow attacks.
The constructor parameters attack_width and sps specify the slope’s delta time. The envelope’s slope must exceed the required onset threshold. This prevents slow moving signals to pass as valid onsets. For example, given an attack width of 500 µs and an onset threshold of -30 dB, the difference in amplitude over a period of 500 µs must exceed -30 dB to pass as a valid onset.
Declaration
struct onset_gate : noise_gate
{
onset_gate(
decibel onset_threshold
, decibel release_threshold
, duration attack_width
, float sps
);
using noise_gate::operator();
bool operator()(float env);
};Expressions
As a subclass of noise_gate, onset_gate inherits all the publicly accessible member functions, member variables, and types of its base class.
In addition to valid expressions for noise_gate, onset_gate allows these expressions.