package com.utils;

import net.dv8tion.jda.api.audio.AudioSendHandler;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import javax.sound.sampled.UnsupportedAudioFileException;

public class MyAudioSendHandler implements AudioSendHandler {

  private static final int SAMPLE_RATE = 48000; // 48KHz
  private static final int BITS_PER_SAMPLE = 16; // 16-bit
  private static final int CHANNELS = 2; // Stereo
  private static final int BYTES_PER_SAMPLE = BITS_PER_SAMPLE / 8;
  private static final int FRAME_SIZE = BYTES_PER_SAMPLE * CHANNELS;
  private static final int BUFFER_SIZE = FRAME_SIZE * SAMPLE_RATE * 20 / 1000; // buffer for 20ms of audio

  private final URL audioUrl;
  private InputStream inputStream;
  private final byte[] buffer = new byte[BUFFER_SIZE];
  private volatile boolean isPlaying = false;

  public MyAudioSendHandler(String urlString) throws IOException {
    audioUrl = new URL(urlString);

    openAudioStream();
  }

  private void openAudioStream() {
    try {
      String ffmpegCommand = "ffmpeg -i " + audioUrl + " -ar " + SAMPLE_RATE + " -sample_fmt s16 -ac "
          + CHANNELS
          + " -f s16le -";

      ProcessBuilder builder = new ProcessBuilder(ffmpegCommand.split(" "));

      builder.redirectErrorStream(true);

      Process process = builder.start();

      inputStream = process.getInputStream();

      isPlaying = true;
    } catch (Exception e) {
      System.err.println("Failed to open audio stream: " + e.getMessage());
    }
  }

  @Override
  public boolean canProvide() {
    return isPlaying && inputStream != null;
  }

  @Override
  public ByteBuffer provide20MsAudio() {
    ByteBuffer audioBuffer = ByteBuffer.allocate(BUFFER_SIZE);
    audioBuffer.order(ByteOrder.BIG_ENDIAN);

    try {
      int bytesRead = inputStream.read(buffer); // Read directly into the buffer

      if (bytesRead == -1) {
        this.isPlaying = false;
        inputStream.close();
        return null;
      }

      audioBuffer.clear();
      audioBuffer.put(buffer, 0, bytesRead);
      audioBuffer.flip();

      return audioBuffer;
    } catch (IOException e) {
      e.printStackTrace(); // Log any IO errors
      return null;
    }
  }

  @Override
  public boolean isOpus() {
    return false;
  }

  public void start() {
    isPlaying = true;
    System.out.println("Playback started.");
  }

  public void stop() {
    isPlaying = false;
    System.out.println("Playback stopped.");
    try {
      inputStream.close();
    } catch (Exception e) {
      System.err.println("Error closing audio stream: " + e.getMessage());
    }
  }
}

I’ve tried so many ways and this is the code that plays part of the song I try to put on. There is always a loud, high pitched noise.
I am trying to make my own AudioSendHandler, without relying on libraries like lavaplayer.
I am not sure but it could be that the ffmpeg stream is not downloading fast enough to be read.