ESP32-audioI2S VS yummyDSP

This library documentation has some more information on this... https://github.com/schreibfaul1/ESP32-audioI2S/wiki

I'm using Audio.h, and have reverse engineered the library: https://github.com/schreibfaul1/ESP32-audioI2S/blob/master/src/Audio.cpp

#include #include // Initializes Library with numbers of the interface pins //LiquidCrystal lcd(5, 18, 19, 21, 22, 23); /* * LCD RS pin to digital pin 7 * LCD Enable pin to digital pin 8 * LCD D4 pin to digital pin 9 * LCD D5 pin to digital pin 10 * LCD D6 pin to digital pin 11 * LCD D7 pin to digital pin 12 * LCD R/W pin to ground * LCD VSS pin to ground * LCD VCC pin to 5V */ #include "Arduino.h" #include "WiFi.h" #include "Audio.h" #include "SD.h" #include "FS.h" // Digital I/O used #define SD_CS 5 #define SPI_MOSI 23 #define SPI_MISO 19 #define SPI_SCK 18 #define I2S_DOUT 25 #define I2S_BCLK 27 #define I2S_LRC 26 #define RXD2 16 #define TXD2 17 // == Radio Station Switching logic == int currentPotVal = 0; int previousPotVal = 0; bool stationOne = true; bool stationTwo = true; bool stationThree = true; bool stationFour = true; //String incomingData; Audio audio; String ssid = "3c1e044268dc"; String password = "5SDMUKLI2V34ALB7"; void setup() { //WiFi Setup pinMode(SD_CS, OUTPUT); digitalWrite(SD_CS, HIGH); SPI.begin(SPI_SCK, SPI_MISO, SPI_MOSI); Serial.begin(115200); Serial2.begin(9600, SERIAL_8N1, RXD2, TXD2); Serial.println("Serial Txd is on pin: "+String(TX)); Serial.println("Serial Rxd is on pin: "+String(RX)); ////////////////////////////////////////////////////// SD.begin(SD_CS); WiFi.disconnect(); WiFi.mode(WIFI_STA); WiFi.begin(ssid.c_str(), password.c_str()); while (WiFi.status() != WL_CONNECTED) delay(1500); audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT); audio.setVolume(21); // 0...21 // audio.connecttoFS(SD, "/320k_test.mp3"); // audio.connecttohost("http://www.wdr.de/wdrlive/media/einslive.m3u"); // audio.connecttohost("https://stream.srg-ssr.ch/rsp/aacp_48.asx"); // SWISS POP // audio.connecttohost("http://mp3.ffh.de/radioffh/hqlivestream.aac"); // 128k aac // Favorite 1 // audio.connecttohost("http://mp3.ffh.de/radioffh/hqlivestream.mp3"); // 128k mp3 // audio.connecttohost("https://github.com/schreibfaul1/ESP32-audioI2S/raw/master/additional_info/Testfiles/sample1.m4a"); // m4a // audio.connecttohost("https://github.com/schreibfaul1/ESP32-audioI2S/raw/master/additional_info/Testfiles/test_16bit_stereo.wav"); // wav // audio.connecttospeech("Wenn die Hunde schlafen, kann der Wolf gut Schafe stehlen.", "de"); audio.connecttohost("https://radio.streemlion.com/newwave"); //New Wave Station // audio.connecttohost("https://open.spotifycdn.com/cdn/build/web-player/vendor~web-player.2b906d15.js"); //Custom HTML delay(1200); } void loop() { while (Serial2.available()) { Serial.print(char(Serial2.read())); } while (Serial.available() > 0) { String message = Serial.readString(); if (message == "0250") { currentPotVal = 250; Serial.print("currentPotVal: "); Serial.println(currentPotVal); } if (message == "0500") { currentPotVal = 500; Serial.print("currentPotVal: "); Serial.println(currentPotVal); } if (message == "0750") { currentPotVal = 750; Serial.print("currentPotVal: "); Serial.println(currentPotVal); } if (message) == "1000") { currentPotVal = 1000; Serial.print("currentPotVal: "); Serial.println(currentPotVal); } } // == Station Switching == if (currentPotVal != previousPotVal) { if (currentPotVal == 250 && stationOne == true) { Serial.print("The Value is in between 0 and 250: "); Serial.println(currentPotVal); audio.connecttohost("https://radio.streemlion.com/newwave"); stationOne = false; stationTwo = true; stationThree = true; stationFour = true; delay(1200); } else if (currentPotVal == 500 && stationTwo == true) { Serial.print("The Value is in between 251 and 500: "); Serial.println(currentPotVal); audio.connecttohost("http://mp3.ffh.de/radioffh/hqlivestream.aac"); stationOne = true; stationTwo = false; stationThree = true; stationFour = true; delay(1200); } else if (currentPotVal == 750 && stationThree == true) { Serial.print("The Value is in between 501 and 750: "); Serial.println(currentPotVal); audio.connecttohost("http://mp3.ffh.de/radioffh/hqlivestream.mp3"); stationOne = true; stationTwo = true; stationThree = false; stationFour = true; delay(1200); } else if (currentPotVal == 1000 && stationFour == true) { Serial.print("The Value is in between 751 and 1023: "); Serial.println(currentPotVal); audio.connecttohost("https://github.com/schreibfaul1/ESP32-audioI2S/raw/master/additional_info/Testfiles/test_16bit_stereo.wav"); stationOne = true; stationTwo = true; stationThree = true; stationFour = false; delay(1200); } previousPotVal = currentPotVal; } audio.loop(); //Serial.print("======="); //Serial.println(currentPotVal); Serial.print("Current Pot Val: "); //Serial.println(previousPotVal); Serial.print("PREVIOUS POT VAL: "); } // Radio Station Serial Monitor Info void audio_info(const char *info){ //Serial.print("info "); Serial.println(info); } void audio_id3data(const char *info){ //id3 metadata Serial.print("id3data ");Serial.println(info); } void audio_eof_mp3(const char *info){ //end of file Serial.print("eof_mp3 ");Serial.println(info); } void audio_showstation(const char *info){ //PRINT STATION INFO Serial.print("station ");Serial.println(info); /*Serial2.print("Station: ");*/Serial2.println(info); } void audio_showstreamtitle(const char *info){ //PRINT SONG TITLE INFO Serial.print("streamtitle ");Serial.println(info); /*Serial2.print("Song Title: ");*/Serial2.println(info); } void audio_bitrate(const char *info){ Serial.print("bitrate ");Serial.println(info); } void audio_commercial(const char *info){ //duration in sec Serial.print("commercial ");Serial.println(info); } void audio_icyurl(const char *info){ //homepage Serial.print("icyurl ");Serial.println(info); } void audio_lasthost(const char *info){ //stream URL played Serial.print("lasthost ");Serial.println(info); } void audio_eof_speech(const char *info){ Serial.print("eof_speech ");Serial.println(info); }

Are you sure? This project seems to think otherwise, although if you want analog it might be a fun experiment to make it use the ESP32's DAC rather than the I2S peripheral.

I think the best way is to use a I2S amplifier, and a library like this: https://github.com/schreibfaul1/ESP32-audioI2S

I use that same DAC for this project : https://github.com/marchingband/campusradioradio/blob/main/campusradioradio.ino which uses this Arduino library https://github.com/schreibfaul1/ESP32-audioI2S

I tried these libraries: https://github.com/pschatzmann/arduino-audio-tools https://github.com/schreibfaul1/ESP32-audioI2S

I need to add more memory to my Lolin32 Webradio to avoid the constant dropouts that some stations have given. I use the ESP32-audioI2S library. Here in Brazil, access to components is extremely difficult, and we often resort to expensive imports via Aliexpress or eBay. The modules or memory chips that we have on the market are usually of the I2C flash type, like this one or this one. On Aliexpress, the only PSRAM I found was the 23LC1024 chip (128kB - $5.04). But I see chips 23K256 (32kB SPI serial SRAM - $1.38), 24C1024 (128kB I2C EEPROM - $2.30) and 25LC1024 (128kB SPI EEPROM - $1.84) available. Can I use these cheaper options?

Maybe this would inspire you as far as having buttons do creative modifications to the music: https://github.com/garygru/yummyDSP