EncodedAudioStream (URLStream) combined with AudioEffectsStream

[vegasje]

Problem Description

First off, let me say that this project is absolutely incredible, and you have done an amazing thing for the community by making all this functionality available. I truly appreciate all the effort that has gone into this codebase.

The issue I'm running into is that I cannot seem to get Audio Effects working with an EncodedAudioStream. I am currently using a VolumeStream to control the volume of an internet radio stream. I am attempting to swap out the VolumeStream for an AudioEffectStream with a Boost effect applied.

The included code will output no audio, however if I comment out pipeline.add(effectsStream);, then audio is emitted.

If I change the logger to output Debug information, it looks like 0 bytes of data gets copied once the AudioEffectStream is added to the pipeline.

Any advice would be greatly appreciated.

Device Description

ESP32-S3-DevKitC-1-N8R8

Sketch

#include <Arduino.h>

#include "AudioTools.h"
#include "AudioCodecs/CodecMP3Helix.h"

// Define I2S connections
#define I2S_DOUT  15
#define I2S_BCLK  16
#define I2S_LRC   17
#define VOL_CONTROL 5

float volume = 0.1;

const char* ssid = "SSID";
const char* password = "PASS";

Pipeline pipeline;
URLStream urlStream(ssid, password);
EncodedAudioStream encAudioStream(new MP3DecoderHelix());
VolumeStream volumeStream;
AudioEffectStream effectsStream;
I2SStream i2sStream; // Final output of decoded stream.
StreamCopy copier(i2sStream, pipeline);

const int sample_rate = 44100;
Delay dly(998, 0.5, 1.0, sample_rate);

Boost boost(volume);

void setup() {
  Serial.begin(115200);

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

  auto config = i2sStream.defaultConfig(TX_MODE);
  config.pin_bck = I2S_BCLK;
  config.pin_ws = I2S_LRC;
  config.pin_data = I2S_DOUT;
  i2sStream.begin(config);

  urlStream.begin("http://0n-80s.radionetz.de:8000/0n-70s.mp3", "audio/mp3");

  volumeStream.setVolume(volume);

  effectsStream.addEffect(boost);
  // effectsStream.addEffect(dly);
  // effectsStream.begin(config);

  pipeline.setInput(urlStream);
  pipeline.add(encAudioStream);
  // pipeline.add(volumeStream);
  pipeline.add(effectsStream);
  pipeline.begin();
}

void loop() {
  // Get the volume level.
  // min in 0 - max is 1.0
  volume = static_cast<float>(analogRead(VOL_CONTROL)) / 4095.0;
  volumeStream.setVolume(volume);
  boost.setVolume(volume);

  copier.copy();
}

Other Steps to Reproduce

No response

What is your development environment

Arduino IDE 2.3.2, MacOS

I have checked existing issues, discussions and online documentation

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

[pschatzmann]

I committed a correction for this.

Please note that the AudioEffectStream does not support stereo and it will output 2 identical mono channels as a result if you feed some stereo to it.

I think it would also be a bit more memory efficient to use the pipline on the output side.

[vegasje]

Thank you! That worked perfectly.