Estimates the DC (very low frequency) content of a signal so it can be removed to form a DC blocker. More...

#include <gin_dcblocker.h>

Public Member Functions
	DCBlocker ()
	~DCBlocker ()
void	setSampleRate (float sampleRate_)
void	setCutoff (float cutoff_)
float	process (float x)
	Returns the low-pass (DC) estimate of x.
void	reset ()

Detailed Description

Estimates the DC (very low frequency) content of a signal so it can be removed to form a DC blocker.

process() returns a first-order low-pass estimate of the input's DC bias. To block DC, subtract that estimate from the input: the difference is the high-passed signal. This is useful after certain DSP operations (like waveshaping or oscillators) that may introduce DC bias.

Key Features:

Configurable cutoff frequency (default 10 Hz)
First-order IIR low-pass estimator
Very low CPU usage
Reset for clearing filter state

Usage:

DCBlocker blocker;
blocker.setSampleRate(44100.0f);
blocker.setCutoff(10.0f); // Treat content below 10 Hz as DC
 
// Per-sample processing: subtract the DC estimate to block DC
float output = input - blocker.process(input);

Note: This is a per-sample filter. For stereo, use two instances.

See also: WTOscillator

Constructor & Destructor Documentation

◆ DCBlocker()

DCBlocker::DCBlocker ( )

◆ ~DCBlocker()

DCBlocker::~DCBlocker ( )

Member Function Documentation

◆ setSampleRate()

void DCBlocker::setSampleRate ( float sampleRate_ )

◆ setCutoff()

void DCBlocker::setCutoff ( float cutoff_ )

◆ process()

float DCBlocker::process ( float x )

Returns the low-pass (DC) estimate of x.

Subtract this from x to block DC.

◆ reset()

void DCBlocker::reset ( )

The documentation for this class was generated from the following file:

gin_dcblocker.h

Public Member Functions