Has anyone gotten MP3 streaming to work on Core2?

[wsanders]

I'm about ready to give up after three days of trial and error. Has anyone gotten MP3 streaming to work on Core2?

Yesterday, I was able to stream a low-bandwidth station but today even that doesn't work. I posted some examples of what I have tried, in https://github.com/wsanders/M5Core2-Audio-Is-Broken. The sketch WSWebRadio-broken.ino was working yesterday for a low-bandwith (32k) stream, but produced broken distorted audio from a 192k stream. Today none of the programs in my repo produce any audio.

I haven't seen any posts about working MP3 streaming sketches less than a couple years old, which seems to hint that it just doesn't work. Maybe everyone has switched to MicroPython?

I am using Arduino IDE, M5Core2 library 0.1.9, ESP8266Audio 1.9.7.

[wsanders]

I got the sketches to work, They will be posted to the above repo shortly. The key changes from some of the existing code out there that does not work anymore:

After WiFi connects, the delay must be increased to at least 1 sec:

  while ( !WiFi.isConnected() ) delay(100);
  delay(1000);

Preallocating the source buffer seems to be essential:

const int preallocateBufferSize = 128*1024;
const int preallocateCodecSize = 85332; // AAC+SBR codec max mem needed
void *preallocateBuffer = NULL;
void *preallocateCodec = NULL;
...
  // Don't forget to malloc the buffers
  preallocateBuffer = malloc(preallocateBufferSize);
  preallocateCodec = malloc(preallocateCodecSize);
...
srcbuf = new AudioFileSourceBuffer(file, preallocateBuffer, preallocateBufferSize);
...
  // Preallocating the MP3 generator doesn't seem to be essential
  //gen = new AudioGeneratorMP3(preallocateCodec, preallocateCodecSize);

You must call M5.begin with the 6th argument false to disable the M5.Speaker code. With this argument, the skeptch will produce audio, but at half speed and half pitch:

  M5.begin(true, false, true, true, kMBusModeOutput, false);

My M5Core2 library version is 0.1.9. I have 2.0.9 of the M5 board. definitions.

[wsanders]

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