Gapless looping of audio

[KyodaiKen]

Hi,

I'm trying to make a little noise box to make me sleep better at night.

So I tried to start very basic before I record or create flac files to play in loop from a local webserver.

#include <Arduino.h>
#include "AudioFileSourceFunction.h"
#include "AudioGeneratorWAV.h"
#include "AudioOutputI2S.h"

AudioGeneratorWAV* wav;
AudioFileSourceFunction* file;
AudioOutputI2S* out;

void setup() {
  Serial.begin(115200);
  delay(100);
  file = new AudioFileSourceFunction(8.);

  file->addAudioGenerators([&](const float time) {
    return random(0.0,2.0) * 0.125;
  });

  out = new AudioOutputI2S();
  wav = new AudioGeneratorWAV();
  wav->begin(file, out);
  delay(100);
}

void loop() {
  if (wav->isRunning()) {
    wav->loop();
  } else {
    file->seek(0,0);
    wav->begin(file, out);
  }
}

Unfortunately the file is closed when the file ends.
Is there no way to make it so the pointer is moved back to the beginning again when the next buffer is being read?

[sittelle]

Hi KyodaiKen,

the following works for me:

if (audioGeneratorMP3.isRunning()) {
    if (currentRequest.playInfinitely) {
        long millisLeft = audioFileSourceLittleFS.getSize() - audioFileSourceLittleFS.getPos();
        if (millisLeft < 5) {
          audioFileSourceLittleFS.seek(0, SEEK_SET);
        }
    }
}

This rewinds my audio when only 5 ms are left to play. I am sure you can even reduce it to 1.

Regards