DCBlocker Class Reference

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_

)

Referenced by WTOscillator::setSampleRate().

setCutoff()

void DCBlocker::setCutoff

(

float

cutoff_

)

Referenced by WTOscillator::setSampleRate().

process()

float DCBlocker::process

(

float

x

)

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

Subtract this from x to block DC.

Referenced by WTOscillator::processAdding().

reset()

void DCBlocker::reset

(

)

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

• gin_dcblocker.h