Generate Code for Parametric Audio Equalizer Model

Introduction

Parametric equalizers are often used to adjust the frequency response of an audio system. For example, a parametric equalizer can be used to compensate for physical speakers which have peaks and dips at different frequencies.

In this example, the parametric equalizer algorithm provides a second-order section (SOS) filter, allowing for the adjustment of coefficients to achieve a desired frequency response. The Parametric Equalizer Design methodology is employed to fine-tune these coefficients.

In this example, you learn:

Explore Parametric Equalizer Behavior Through Simulation

In this example, the model ParametricAudioEqDemo includes an excitation source and specifications for each band of the equalizer (gain, center frequency, and bandwidth). These specifications may be tuned as the model is running.

To open the model, enter the following command:

modelName = "ParametricAudioEqDemo";
open_system(modelName)

Simulate the model.

sim(modelName,"StopTime","1");

Close the model.

bdclose(modelName)

Code Generation

You can generate code from this three-band parametric equalizer for hardware targets. See Parametric Audio Equalizer for Qualcomm Hexagon DSP (Embedded Coder) and Deploy Parametric Audio Equalizer on ARM Cortex-M Processors (Embedded Coder) for examples demonstrating code generation for this model on different hardware targets.