memory and chopped samples

[miseentropique]

Hellowh!

I'm new to using audio with chips, I was mostly processing this aspect with touch designer und Ableton.

I'm having an ESP3332 A1S, and I'd like to receive OSC datas from others ESPs (no problem till here) and trigger samples from the SD card depending on the received informations over OSCs. I'm programming on the Arduino IDE and example sketches just to read WAV samples from an SD card are taking 88% of the memory, therefore the outcome is chopped and glitchy samples. I did explain my idea here, because maybe I'm not using the correct hardware

Codec:
I firstly started with MP3 but I understood that it consumes more memory than WAV, so I move on this format and reduce my sample at 22.000kHz in mono.

Logs:
I also disabled the log to see if the memory would be lighter, and it didn't apply any noticeable changes.

Hardware:
I'm also having this in my serial since i've started to work on my own 'Warning: Pin '13' not set up because of conflict'

My code:

#define DISABLE_AUDIO_LOGGING // 🔇 Désactive les logs internes AudioTools
#include <WiFi.h>
#include <WiFiUdp.h>
#include <OSCMessage.h>
#include <AudioTools.h>
#include <AudioTools/AudioLibs/AudioBoardStream.h>
#include <AudioTools/Disk/AudioSourceSDMMC.h>
#include <AudioTools/AudioCodecs/CodecWAV.h>
#include <SD.h> // Ajoute la bibliothèque SD pour vérifier les fichiers

// === Wi-Fi ===
const char* ssid = "";
const char password = "";

// === Audio ===
const char startFilePath = "/audio/"; // Modifie le chemin vers le dossier audio
const char ext = "wav"; // Extension pour fichiers WAV 16 bits PCM 22 kHz
AudioSourceSDMMC source(startFilePath, ext);
AudioBoardStream kit(AudioKitEs8388V1);
WAVDecoder decoder; // Assurez-vous que le décodeur gère 16 bits PCM
AudioPlayer player(source, kit, decoder);

// === Boutons ===
#define BUTTON_PIN1 36 // KEYS1
#define BUTTON_PIN2 39 // KEYS2 (non utilisé ici)
bool buttonPrevState1 = false;

// === OSC ===

---

// === Connexion Wi-Fi ===

---

// === Initialisation carte SD ===
void initSDCard() {
while (!SD_MMC.begin("/sdcard", true)) {
delay(1000);
}
}

// === Initialisation OSC ===

---

void checkEmitterTimeout() {
if (!emitterFound || (millis() - lastPacketTime > timeoutInterval)) {
if (millis() - lastEmitterCheckTime > 5000) { // Vérifie tous les 5 secondes
emitterFound = false;
lastEmitterCheckTime = millis();
}
}
}

void processOSCMessage() {
int packetSize = Udp.parsePacket();
if (packetSize) {
int len = Udp.read(incomingPacket, 255);
if (len > 0) {
incomingPacket[len] = 0;
}

OSCMessage msg;
uint8_t* incomingData = (uint8_t*)incomingPacket;
msg.fill(incomingData, len);

if (msg.size() > 0) {
  emitterFound = true;
  lastPacketTime = millis();

  if (msg.match("/accelX")) {
    if (msg.isFloat(0)) {
      float valueX = msg.getFloat(0);
    }
  } else if (msg.match("/accelY")) {
    if (msg.isFloat(0)) {
      float valueY = msg.getFloat(0);
    }
  } else if (msg.match("/accelZ")) {
    if (msg.isFloat(0)) {
      float valueZ = msg.getFloat(0);
    }
  }
}

}
}

void setup() {
Serial.begin(115200);
connectToWiFi();
auto cfg = kit.defaultConfig(TX_MODE);
cfg.sd_active = false;
kit.begin(cfg);

initSDCard();
initOSC();

pinMode(BUTTON_PIN1, INPUT);
pinMode(BUTTON_PIN2, INPUT); // Bouton 2 est inutilisé ici

// Initialisation du player
player.begin();
}

void loop() {
player.copy();

bool currentState1 = digitalRead(BUTTON_PIN1);

// Si l'état du bouton change, on l'affiche
if (currentState1 == HIGH && buttonPrevState1 == LOW) {
// Liste des fichiers dans le répertoire /audio/
File dir = SD.open("/audio");
if (dir) {
// Crée une liste des fichiers WAV
String files[100]; // Tableau pour stocker les chemins de fichiers
int fileCount = 0;

  // Parcours les fichiers du répertoire
  while (true) {
    File entry = dir.openNextFile();
    if (!entry) {
      break;  // Si on a atteint la fin, on sort de la boucle
    }
    if (!entry.isDirectory() && String(entry.name()).endsWith(".wav")) {
      // Ajouter les fichiers WAV dans le tableau
      files[fileCount++] = String(entry.name());
    }
    entry.close();
  }

  // Vérifie si des fichiers ont été trouvés
  if (fileCount > 0) {
    // Choisir un fichier aléatoire parmi ceux trouvés
    int randomIndex = random(0, fileCount);
    String selectedFile = "/audio/" + files[randomIndex];  // Construction du chemin complet

    // Vérification de la présence du fichier sur la carte SD
    if (SD.exists(selectedFile)) {
      player.setIndex(0);  // Choisit le fichier à lire (index 0, peut être amélioré si nécessaire)
    }
  }
  dir.close();
}

}

// Mettre à jour l'état précédent du bouton
buttonPrevState1 = currentState1;

processOSCMessage();
checkEmitterTimeout();

delay(500); // Attente pour éviter le spam du Serial Monitor
}

Thanks for your great work anyhow! Sorry if I'm asking newby questions, I did dive into the formus and the diffrent available ressources online before to post!

Quentin

[pschatzmann]

I suggest you read the The most important basics! and the It's not working to get a better understanding about the restrictions of audio processing...

[miseentropique]

I did went to this section few times, and now just applied the never add any (long) delays() in the loop! and samples are read smoothly now.

Concerning the partition itself, I'm a bit lost on this level... Does it sound normal for you that my Sketch uses 1195126 bytes (91%) of program storage space? And I haven't implemented the next partsyet

[pschatzmann]

I think you just ignored the information about the partition size: the ESP32 has 4MB of PROGMEM!