Java Запись микрофона в байт-массив и воспроизведение звука

Ответ 1

EDIT: Здесь немного лучшая версия той же идеи, что и ниже, которая будет воспроизводиться напрямую при записи

AudioFormat format = new AudioFormat(8000.0f, 16, 1, true, true);
    TargetDataLine microphone;
    SourceDataLine speakers;
    try {
        microphone = AudioSystem.getTargetDataLine(format);

        DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
        microphone = (TargetDataLine) AudioSystem.getLine(info);
        microphone.open(format);

        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int numBytesRead;
        int CHUNK_SIZE = 1024;
        byte[] data = new byte[microphone.getBufferSize() / 5];
        microphone.start();

        int bytesRead = 0;
        DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class, format);
        speakers = (SourceDataLine) AudioSystem.getLine(dataLineInfo);
        speakers.open(format);
        speakers.start();
        while (bytesRead < 100000) {
            numBytesRead = microphone.read(data, 0, CHUNK_SIZE);
            bytesRead += numBytesRead;
            // write the mic data to a stream for use later
            out.write(data, 0, numBytesRead); 
            // write mic data to stream for immediate playback
            speakers.write(data, 0, numBytesRead);
        }
        speakers.drain();
        speakers.close();
        microphone.close();
    } catch (LineUnavailableException e) {
        e.printStackTrace();
    } 

Почувствуйте меня, потому что это действительно грубо, но он воспроизводит записанный звук через динамики;

Чтобы сделать его лучше, вам нужно добавить потоки и оптимизировать потоки ввода/вывода.

http://www.developer.com/java/other/article.php/1579071/Java-Sound-Getting-Started-Part-2-Capture-Using-Specified-Mixer.htm

package audio;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.TargetDataLine;

public class AudioTest {

    public static void main(String[] args) {

        AudioFormat format = new AudioFormat(8000.0f, 16, 1, true, true);
        TargetDataLine microphone;
        AudioInputStream audioInputStream;
        SourceDataLine sourceDataLine;
        try {
            microphone = AudioSystem.getTargetDataLine(format);

            DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
            microphone = (TargetDataLine) AudioSystem.getLine(info);
            microphone.open(format);

            ByteArrayOutputStream out = new ByteArrayOutputStream();
            int numBytesRead;
            int CHUNK_SIZE = 1024;
            byte[] data = new byte[microphone.getBufferSize() / 5];
            microphone.start();

            int bytesRead = 0;

            try {
                while (bytesRead < 100000) { // Just so I can test if recording
                                                // my mic works...
                    numBytesRead = microphone.read(data, 0, CHUNK_SIZE);
                    bytesRead = bytesRead + numBytesRead;
                    System.out.println(bytesRead);
                    out.write(data, 0, numBytesRead);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            byte audioData[] = out.toByteArray();
            // Get an input stream on the byte array
            // containing the data
            InputStream byteArrayInputStream = new ByteArrayInputStream(
                    audioData);
            audioInputStream = new AudioInputStream(byteArrayInputStream,format, audioData.length / format.getFrameSize());
            DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class, format);
            sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo);
            sourceDataLine.open(format);
            sourceDataLine.start();
            int cnt = 0;
            byte tempBuffer[] = new byte[10000];
            try {
                while ((cnt = audioInputStream.read(tempBuffer, 0,tempBuffer.length)) != -1) {
                    if (cnt > 0) {
                        // Write data to the internal buffer of
                        // the data line where it will be
                        // delivered to the speaker.
                        sourceDataLine.write(tempBuffer, 0, cnt);
                    }// end if
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            // Block and wait for internal buffer of the
            // data line to empty.
            sourceDataLine.drain();
            sourceDataLine.close();
            microphone.close();
        } catch (LineUnavailableException e) {
            e.printStackTrace();
        }
    }
}