Practical Audio DSP Projects with the ESP32

Name: Practical Audio DSP Projects with the ESP32 | Easy and Affordable Digital Signal Processing
Brand: Elektor International Media
Price: 29.99 EUR
Availability: OnlineOnly

Easy and Affordable Digital Signal Processing

Dogan Ibrahim Ahmet Ibrahim(Autor*in)

Elektor International Media (Verlag)

1. Auflage

Erschienen am 5. Juli 2023

254 Seiten

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978-3-89576-568-1 (ISBN)

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Inhalt

Intro
Contents
Preface
Chapter 1 The ESP32 Processor
1.1 Overview
1.2 The ESP32 architecture
1.2.1 The CPU
1.2.2 Internal memory
1.2.3 External memory
1.2.4 General purpose timers
1.2.5 Watchdog timers
1.2.6 The system clock
1.2.7 Real-time clock (RTC)
1.2.8 General purpose input-outputs (GPIOs)
1.2.9 Analog to digital converter (ADC)
1.2.10 Digital to analog converter (DAC)
1.2.11 Hall sensor
1.2.12 Built-in temperature sensor
1.2.13 Touch sensor
1.2.14 UART
1.2 15 I2C interface
1.2.16 I2S interface
1.2.17 Infrared controller
1.2.18 Pulse width modulation
1.2.19 LED PWM
1.2.20 Pulse counter
1.2.21 SPI interface
1.2.22 Hardware accelerators
1.2.23 Wi-Fi
1.2.24 Bluetooth
1.2.25 Controller area network (CAN)
1.2.26 SD card support
1.3 ESP32 development boards
Chapter 2 The ESP32 DevKitC Development Board
2.1 Overview
2.2 ESP32 DevKitC hardware
Chapter 3 Using the Arduino IDE with theESP32 DevKitC
3.1 Overview
3.2 Installing the Arduino IDE for the ESP32 DevKitC
Chapter 4 Elementary Projects usingThe Arduino IDE and the ESP32 DevKitC
4.1 Overview
4.2 Project 1: Alternately flashing LEDs
4.3 Project 2: Binary up/down counter with LEDs
4.4 Project 3: Changing the brightness of an LED
4.5 Project 4: Thermometer with output displayed on Serial Mo
4.6 Project 5: LCD-based event counter
4.7 Project 6: Generating waveforms - Sawtooth
4.8 Project 7: Using SD cards - Writing
4.9 Project 8: Using SD cards - Reading
4.10 ESP32 DevKitC network programming with the Arduino IDE
4.10.1 Project 9: Scanning the surrounding WiFi networks
4.10.2 Project 10: Controlling LEDS connected to ESP32 DevKitC froma mobile phone
4.11 Project 11: Bluetooth classic
Chapter 5 Sound
5.1 Overview
5.2 Audible sound waves
5.3 Analog and digital audio sound
5.4 Digital audio sound file formats
5.4.1 Uncompressed audio file formats
5.4.2 Audio files with lossy compression
5.4.3 Audio files with lossless compression
5.4.4 Which audio file format to choose?
5.5 High-quality digital audio sound
Chapter 6 Audio DSP Projects
6.1 Overview
6.2 The I2S bus
6.3 I2S support of popular microcontroller development boards
6.4 The ESP32 DevKitC I2S bus pins
6.5 Project 1: Using a digital microphone to capture audible sound
6.6 Project 2: Using an amplifier and loudspeaker
6.7 Project 3: Playing MP3 music stored on an SD card
6.8 Project 4: Playing a list of music files (playlist)
6.9 Project 5: Internet radio
6.10 Project 6: Text to speech (TTS)
6.11 Project 7: Play all songs on the SD card
6.12 Project 8: Play all songs on the SD card - using an externalvolume control
6.13 Project 9: Internet radio in stereo
6.14 Project 10: Internet radio in stereo with volume control
6.15 Project 11: Playing an MP3 file stored in the flash memory
6.16 Project 12: List of files stored in the flash memory
6.17 Project 13: Speaking event counter
Chapter 7 Discrete-Time Signals
7.1 Overview
7.2 The sampling process
7.3 Some digital signal types
7.3.1 Unit step function
7.3.2 Sinusoidal signal
7.3.3 Exponential signal
7.3.4 Exponential sinusoidal decay signal
7.4 Block diagram representation
7.4.1 Block diagram manipulation
7.5 The convolution process
Chapter 8 The Z-Transform
8.1 Overview
8.2 Unit step function
8.3 Unit ramp function
8.4 Sine function
8.5 Discrete impulse function
8.6 The z-Transform of a function expressed as a Laplace Transform
8.7 Inverse z-transforms
8.7.1 Coefficients of partial fraction expansion
Chapter 9 Digital Filters
9.1 Overview
9.2 FIR Filters and IIR Filters
9.3 The Digital Filter Design Process
Chapter 10 Designing FIR Digital Filters
10.1 Overview
10.2 Truncation and windowing
10.2.1 Rectangular window
10.2.2 Hamming window
10.2.3 Hanning Window
10.2.4 Blackman Window
10.2.4 Kaiser window
10.2.5 Remez Exchange-based design
10.3 Using computer-aided techniques for the design of FIR filters
10.3.1 ScopeFIR
10.3.2 Dr A R Collins FIR filter design
10.4 FIR digital filter structures
10.4.1 Direct FIR structures
10.4.2 Cascade FIR structures
Chapter 11 Design Of IIR Digital Filters
11.1 Overview
11.2 IIR filter transfer function
11.3 Analog filter design review
11.4 Butterworth filters
11.4.1 Bilinear transformation method
11.5 Chebyshev filters
11.6 Elliptic filters
11.7 Computer-aided design tools for the design of IIR digital filters
11.7.1 The ScopeIIR filter design program
11.7.2 The Digital Filter Analyzer IIR design program
11.8 IIR filter structures
11.8.1 Direct structure
11.8.2 Cascade structure
Chapter 12 Designing FIR Digital Filters with theESP32 DevKitC
12.1 Overview
12.2 The PCSGU250
12.3 Arduino Audio Tools library
12.4 Project 1: Sinewave generator
12.5 Project 2: Signal input-output with two independent I2S ports
12.6 Project 3: Signal input-output using a shared I2S port
12.7 Project 4: Designing a FIR low-pass digital filter
12.8 Project 5: Design of a FIR band-pass filter
12.9 Project 6: Design of a FIR high-pass filter
12.10 Design of FIR digital filters from the first principles (withoutusing a library)
12.10.1 ESP32 timers and timer interrupts
12.10.2 Project 7: Flashing an LED using timer interrupts
12.10.3 Project 8: Timer interrupt-driven FIR low-pass filter program
12.10.4 More efficient FIR digital filter program
12.10.5 Project 9: An efficient FIR low-pass filter
Chapter 13 Designing IIR Digital Filters with theESP32 DevKitC
13.1 Overview
13.2 Project 1: Design of an IIR low-pass filter
13.3 IIR filters of any order
13.4 Design of IIR filters without using a filter library
13.4.1 The IIR filter algorithm
13.4.2 Project 2: Design of IIR low-pass filter from the first principles
Chapter 14 Fast Fourier Transform (FFT)
14.1 Overview
14.2 Why FFT?
14.3 Project 1: FFT of an input signal
Appendix A
Appendix B
Index
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