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Practical Audio DSP Projects with the ESP32

Practical Audio DSP Projects with the ESP32 : Easy and Affordable Digital Signal Processing

Title: Practical Audio DSP Projects with the ESP32 : Easy and Affordable Digital Signal Processing
Author: Dogan Ibrahim, Ahmet Ibrahim
Year: 2023
Publisher: Elektor Publication
English language
Format: pdf (true)
Pages: 256
Size: 6.7 MB

Easy and Affordable Digital Signal Processing.


The aim of this book is to teach the basic principles of Digital Signal Processing (DSP) and to introduce it from a practical point of view using the bare minimum of mathematics. Only the basic level of discrete-time systems theory is given, sufficient to implement DSP applications in real time. The practical implementations are described in real time using the highly popular ESP32 DevKitC microcontroller development board.

After laying a solid foundation of DSP theory and pertinent discussions on the main DSP software tools on the market, the book presents the following audio-based sound and DSP projects:
Using an I2S-based digital microphone to capture audio sound.
Using an I2S-based class-D audio amplifier and speaker.
Playing MP3 music stored on an SD card through an I2S-based amplifier and speaker.
Playing MP3 music files stored in ESP32 flash memory through an I2S-based amplifier and speaker.
Mono and stereo Internet radio with I2S-based amplifiers and speakers.
Text-to-speech output with an I2S-based amplifier and speaker.
Using the volume control in I2S-based amplifier and speaker systems.
A speaking event counter with an I2S-based amplifier and speaker.
An adjustable sinewave generator with I2S-based amplifier and speaker.
Using the Pmod I2S2 24-bit fast ADC/DAC module.
Digital low-pass and band-pass real-time FIR filter design with external and internal A/D and D/A conversion.
Digital low-pass and band-pass real-time IIR filter design with external and internal A/D and D/A conversion.
Fast Fourier Transforms (FFT).

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