Multiple songs aren't playing due to memory

[logesh2496]

I tried to load around eight audios in 8 players with average song duration of 3minutes. But the audio stops in between.
This should be something to do with the memory since i tried same with same 8 players but with fewer duration. it worked fine.

[gaborszanto]

Is there any error message? If there is not enough memory, then there should be some.

[logesh2496]

No, there is no error message in the console.

[gaborszanto]

When is the audio stopping exactly? At the same point?

[logesh2496]

Not exactly. For example

1. If i create around 6 song players with 3 minutes duration each. The players doesn't even play.
2. If 8 song players with around 20 seconds duration each. It does play well.
   But the same does not play at all when 16 players are created with 20-30 seconds. But trying to play only 8 players.
   And again no console errors for any of these.
   I would like to understand if there's a memory allocation limitation?

[logesh2496]

Hi @gaborszanto ,

We have followed this sample and hosted the reproduceable sample here.

To reproduce:

1. Go to the site.
2. Start -> 16 song buttons are presented -> Clicking on each one of them will play that song
3. It can be noticed that the song cuts off when around 8 songs are playing at the same time and no errors in the console log.

NOTE: We have also observed that the ability to play multiple songs decreases against no of players loaded at the time.

Thanks.

[logesh2496]

Definitely doesn’t seem to be connected to memory. I log out the total byteLength of the buffers of all playing players and then tried with a different file of 3x the size and it was still stopping after the same number of players.
Initially it was always on the 10th player, then a little while later always on the 9th player, then always on the 8th player.

Each of these buttons calls seek(0) and play() on their respective player

Screen.Recording.2021-05-12.at.16.50.25.mov

[gaborszanto]

Your code erases the contents of the outputBuffer when a player doesn't return with audio. Erase the contents of the outputBuffer only at the very end of processAudio.

[logesh2496]

Thanks @gaborszanto for your response. But changing it to the end of the file still doesn't resolve the issue:

`
processAudio(inputBuffer, outputBuffer, buffersize, parameters) {
let mix = false;
Object.keys(players).forEach((key, idx) => {
const player = players[key];

    const hasAudioOutput = player.processStereo(
      outputBuffer.pointer,
      mix,
      buffersize,
      1
    );
    mix |= hasAudioOutput;
  });

  if (!mix) {
    for (let n = 0; n < buffersize * 2; n++) outputBuffer.array[n] = 0;
  }
}
`