recording WAV to SD is not working with ADPCM

[ffaerber]

Problem Description

i try this example https://www.pschatzmann.ch/home/2023/05/21/adpcm-and-wav-files/ and this https://github.com/pschatzmann/arduino-audio-tools/blob/main/tests-cmake/codec/wav/wav.cpp but its not working. if i record a wav with ADPCM. the wav file is only containing silence with some cracking noises.

Device Description

xiao esp32s3 sense

Sketch

SdFs SD;
AudioInfo info(16000, 1, 16);
I2SStream microphone;
SdFile wavFile;
ADPCMEncoder adpcm_encoder(AV_CODEC_ID_ADPCM_IMA_WAV); 
EncodedAudioStream wavEncoderToFile(&wavFile, new WAVEncoder(adpcm_encoder, AudioFormat::ADPCM));
VolumeStream vol(wavEncoderToFile);
StreamCopy micToFileCopier(wavEncoderToFile, microphone);

I2SStream speaker;
MP3DecoderHelix mp3Decoder;
EncodedAudioStream mp3DecoderToSpeaker(&speaker, &mp3Decoder);
URLStream url;
StreamCopy urlToSpeakerCopier(mp3DecoderToSpeaker, url);

void recorder(void *pvParameters) {
  int randomNumber = random(1000, 10000);
  sprintf(filename, "/%04d.wav", randomNumber);
  if (SD.begin(21)) {
    if (wavFile.open(filename, O_WRONLY | O_CREAT )) {
      Serial.println("wavFile is open");
    }else{
      Serial.println("error open wavFile");
    }
  }
  wavEncoderToFile.begin();
  while (1) {
    if (recording) {
      micToFileCopier.copy();
    } else {
      wavEncoderToFile.end();
      Serial.println("record Stop");
      wavFile.close();
      sendNotification(xHttpControllerHandle, UPLOAD_VOICE_RECORD);
      vTaskDelete(NULL);
    }
  }
}

void player(void *pvParameters) {
  playing = true;
  String apiUrl = String(apiProtocol) + String(apiHostname) + String(":") + String(apiPort);
  String _messageAudioUrl = apiUrl + String("/messages/") + messageId + String("/audio");
  const char* messageAudioUrl = _messageAudioUrl.c_str();
  url.begin(messageAudioUrl, "audio/mp3");
  mp3DecoderToSpeaker.begin();
  urlToSpeakerCopier.copyAll();
  mp3DecoderToSpeaker.end();
  playing = false;
  vTaskDelete(NULL);
}

void audioController(void *pvParameter) {
  uint32_t ulNotificationValue;
  const TickType_t xTicksToWait = portMAX_DELAY;
  TaskHandle_t xRecorderHandle = NULL;
  TaskHandle_t xPlayerHandle = NULL;

  AudioLogger::instance().begin(Serial, AudioLogger::Warning);

  auto microphone_cfg = microphone.defaultConfig(RX_MODE);
  microphone_cfg.copyFrom(info);
  microphone_cfg.signal_type = PDM;
  microphone_cfg.i2s_format = I2S_PCM;    
  microphone_cfg.pin_bck = I2S_PIN_NO_CHANGE;
  microphone_cfg.pin_ws = 42;
  microphone_cfg.pin_data = 41;
  microphone_cfg.port_no = 0;

  auto vol_cfg = vol.defaultConfig();
  vol_cfg.copyFrom(info);
  vol_cfg.allow_boost = true;
  vol.begin(vol_cfg);
  vol.setVolume(12);

  auto speaker_cfg = speaker.defaultConfig(TX_MODE);
  speaker_cfg.copyFrom(info); 
  speaker_cfg.i2s_format = I2S_STD_FORMAT;
  speaker_cfg.port_no = 1;
  speaker_cfg.pin_bck = 4; // BCLK
  speaker_cfg.pin_ws = 43; // LRC
  speaker_cfg.pin_data = 3; // DIN - Data Input
  speaker_cfg.port_no = 1;
  speaker.begin(speaker_cfg);

  microphone.begin(microphone_cfg);
  wavEncoderToFile.begin(info);
  mp3DecoderToSpeaker.begin();

  while (true) {
    if (xTaskNotifyWait(pdFALSE, ULONG_MAX, &ulNotificationValue, xTicksToWait) == pdPASS) {
      EventCode currentEvent = static_cast<EventCode>(ulNotificationValue);

      switch (currentEvent) {

        case START_VOICE_RECORD:
          Serial.println("START_VOICE_RECORD");
          recording = true;
          xTaskCreatePinnedToCore(recorder, "recorder", 12*1024, NULL, 1, &xRecorderHandle, APP_CPU);
          break;

        case STOP_VOICE_RECORD:
          Serial.println("STOP_VOICE_RECORD");
          recording = false;
          sendNotification(xMqttControllerHandle, PUBLISH_APP_STATE);
          break;

        case START_PLAY:
          Serial.println("START_PLAY");
          xTaskCreatePinnedToCore(player, "player", 24*1024, NULL, 1, &xPlayerHandle, APP_CPU);
          break;

        default:
          Serial.println("Unknown event in microphone");
          break;
      }
    } else {
      Serial.println("Failed to receive from appEventQueue");
    }

    vTaskDelay(100 / portTICK_PERIOD_MS);
  }
}

Other Steps to Reproduce

recording to SD without ADPCMEncoder works fine.

What is your development environment

Arduino

I have checked existing issues, discussions and online documentation

• [X] I confirm I have checked existing issues, discussions and online documentation

[pschatzmann]

The adpcm test case was passing successfully. The WAV codec was indeed broken: I committed a correction and added a corresponding test case