DCRemoval

Inputs

• signal (real) - the input audio signal

Outputs

• signal (real) - the filtered signal, with the DC component removed

Parameters

• cutoffFrequency (real ∈ (0, ∞), default = 40) :

  the cutoff frequency for the filter [Hz]

• sampleRate (real ∈ (0, ∞), default = 44100) :

  the sampling rate of the audio signal [Hz]

Description

This algorithm removes the DC offset from a signal using a 1st order IIR highpass filter. Because of its dependence on IIR, IIR’s requirements are inherited.

References:

[1] Smith, J.O. Introduction to Digital Filters with Audio Applications, http://ccrma-www.stanford.edu/~jos/filters/DC_Blocker.html

Source code

• C++ source code

• C++ header file

See also

DCRemoval (standard) IIR (standard) IIR (streaming)