Android : recording audio using audiorecord class play as fast forwarded
14,811
Solution 1
I got the solution.. here is my code
public class Audio_Record extends Activity {
private static final int RECORDER_SAMPLERATE = 8000;
private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO;
private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;
private AudioRecord recorder = null;
private Thread recordingThread = null;
private boolean isRecording = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setButtonHandlers();
enableButtons(false);
int bufferSize = AudioRecord.getMinBufferSize(RECORDER_SAMPLERATE,
RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING);
System.out.println("BUFFER SIZE VALUE IS " + bufferSize);
}
private void setButtonHandlers() {
((Button) findViewById(R.id.btnStart)).setOnClickListener(btnClick);
((Button) findViewById(R.id.btnStop)).setOnClickListener(btnClick);
}
private void enableButton(int id, boolean isEnable) {
((Button) findViewById(id)).setEnabled(isEnable);
}
private void enableButtons(boolean isRecording) {
enableButton(R.id.btnStart, !isRecording);
enableButton(R.id.btnStop, isRecording);
}
int BufferElements2Rec = 1024; // want to play 2048 (2K) since 2 bytes we
// use only 1024
int BytesPerElement = 2; // 2 bytes in 16bit format
private void startRecording() {
recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
RECORDER_SAMPLERATE, RECORDER_CHANNELS,
RECORDER_AUDIO_ENCODING, BufferElements2Rec * BytesPerElement);
recorder.startRecording();
isRecording = true;
recordingThread = new Thread(new Runnable() {
public void run() {
writeAudioDataToFile();
}
}, "AudioRecorder Thread");
recordingThread.start();
}
private byte[] short2byte(short[] sData) {
int shortArrsize = sData.length;
byte[] bytes = new byte[shortArrsize * 2];
for (int i = 0; i < shortArrsize; i++) {
bytes[i * 2] = (byte) (sData[i] & 0x00FF);
bytes[(i * 2) + 1] = (byte) (sData[i] >> 8);
sData[i] = 0;
}
return bytes;
}
private void writeAudioDataToFile() {
// Write the output audio in byte
String filePath = "/sdcard/voice8K16bitmono.pcm";
short sData[] = new short[BufferElements2Rec];
FileOutputStream os = null;
try {
os = new FileOutputStream(filePath);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
while (isRecording) {
// gets the voice output from microphone to byte format
recorder.read(sData, 0, BufferElements2Rec);
System.out.println("Short wirting to file" + sData.toString());
try {
// // writes the data to file from buffer
// // stores the voice buffer
byte bData[] = short2byte(sData);
os.write(bData, 0, BufferElements2Rec * BytesPerElement);
} catch (IOException e) {
e.printStackTrace();
}
}
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
private void stopRecording() {
// stops the recording activity
if (null != recorder) {
isRecording = false;
recorder.stop();
recorder.release();
recorder = null;
recordingThread = null;
}
}
private View.OnClickListener btnClick = new View.OnClickListener() {
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnStart: {
enableButtons(true);
startRecording();
break;
}
case R.id.btnStop: {
enableButtons(false);
stopRecording();
break;
}
}
}
};
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
finish();
}
return super.onKeyDown(keyCode, event);
}
}
Solution 2
I had a lot of trouble implementing this for myself. I had done many of the things everyone said above. I implemented this as it's own class called Recorder (and rolled in all of the above 'fixes' as well as a few other tweaks). I hope my code can help someone else save the many hours I laboured over this:
public class Recorder {
//Begin private fields for this class
private AudioRecord recorder;
private static final int RECORDER_BPP = 16;
private static final String AUDIO_RECORDER_FILE_EXT_WAV = "AudioRecorder.wav";
private static final String AUDIO_RECORDER_FOLDER = "AudioRecorder";
private static final String AUDIO_RECORDER_TEMP_FILE = "record_temp.raw";
private static final int RECORDER_SAMPLERATE = 8000;
private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO;
private static final int RECORDER_CHANNELS_INT = 1;
private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;
private int bufferSize = 200000;
short[] buffer;
private Thread recordingThread = null;
private boolean isRecording = false;
//Constructor
Recorder(String uniquename)
{
//Initilize our recorder object
/*recorder = new AudioRecord(
MediaRecorder.AudioSource.MIC,
44100,
AudioFormat.CHANNEL_IN_MONO,
AudioFormat.ENCODING_PCM_16BIT,
AudioRecord.getMinBufferSize(44100,AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT)
);
*/
int bufferSize = AudioRecord.getMinBufferSize(RECORDER_SAMPLERATE,
RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING);
System.out.println("BUFFER SIZE VALUE IS " + bufferSize);
int buffercount = 4088 / bufferSize;
if (buffercount < 1)
buffercount = 1;
recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
RECORDER_SAMPLERATE, RECORDER_CHANNELS,
RECORDER_AUDIO_ENCODING, 44100);
//recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
//recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
//recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
}
public void start() throws IllegalStateException, IOException
{
buffer = new short[4088];
recorder.startRecording();
isRecording = true;
recordingThread = new Thread(new Runnable()
{
@Override
public void run() {
writeAudioDataToFile();
}
}, "AudioRecorder Thread");
recordingThread.start();
}
public void stop()
{
System.out.println("Told to stop");
stopRecording();
}
public boolean isRecording()
{
if(recorder.getRecordingState() == AudioRecord.RECORDSTATE_RECORDING)
return true;
else
return false;
}
private void stopRecording() {
// stops the recording activity
if (null != recorder) {
isRecording = false;
recorder.stop();
recorder.release();
recorder = null;
recordingThread = null;}
// copy the recorded file to original copy & delete the recorded copy
copyWaveFile(getTempFilename(), getFilename());
deleteTempFile();
} // stores the file into the SDCARD
private String getFilename() {
System.out.println("---3---");
String filepath = Environment.getExternalStorageDirectory().getPath();
File file = new File(filepath, AUDIO_RECORDER_FOLDER);
if (!file.exists()) {
file.mkdirs();
}
return (file.getAbsolutePath() + "/" + AUDIO_RECORDER_FILE_EXT_WAV);
}
private void deleteTempFile() {
File file = new File(getTempFilename());
file.delete();
}
private void copyWaveFile(String inFilename, String outFilename) {
System.out.println("---8---");
FileInputStream in = null;
FileOutputStream out = null;
long totalAudioLen = 0;
long totalDataLen = totalAudioLen + 36;
long longSampleRate = RECORDER_SAMPLERATE;
int channels = RECORDER_CHANNELS_INT;
long byteRate = RECORDER_BPP * RECORDER_SAMPLERATE * channels / 8;
byte[] data = new byte[bufferSize];
try {
in = new FileInputStream(inFilename);
out = new FileOutputStream(outFilename);
totalAudioLen = in.getChannel().size();
totalDataLen = totalAudioLen + 36;
Controller.doDoc("File size: " + totalDataLen, 4);
WriteWaveFileHeader(out, totalAudioLen, totalDataLen,
longSampleRate, channels, byteRate);
byte[] bytes2 = new byte[buffer.length * 2];
ByteBuffer.wrap(bytes2).order(ByteOrder.LITTLE_ENDIAN)
.asShortBuffer().put(buffer);
while (in.read(bytes2) != -1) {
out.write(bytes2);
}
in.close();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
// stores the file into the SDCARD
private String getTempFilename() {
// Creates the temp file to store buffer
System.out.println("---4-1--");
String filepath = Environment.getExternalStorageDirectory().getPath();
System.out.println("---4-2--");
File file = new File(filepath, AUDIO_RECORDER_FOLDER);
System.out.println("---4-3--");
if (!file.exists()) {
file.mkdirs();
}
File tempFile = new File(filepath, AUDIO_RECORDER_TEMP_FILE);
System.out.println("---4-4--");
if (tempFile.exists())
tempFile.delete();
System.out.println("---4-5--");
return (file.getAbsolutePath() + "/" + AUDIO_RECORDER_TEMP_FILE);
}
private void writeAudioDataToFile() {
// Write the output audio in byte
byte data[] = new byte[bufferSize];
String filename = getTempFilename();
//
FileOutputStream os = null;
//
try {
//
os = new FileOutputStream(filename);
//
} catch (FileNotFoundException e) {
e.printStackTrace();
}
int read = 0;
// if (null != os) {
while (isRecording) {
// gets the voice output from microphone to byte format
recorder.read(buffer, 0, buffer.length);
// read = recorder.read(data, 0, 6144);
if (AudioRecord.ERROR_INVALID_OPERATION != read) {
try {
// // writes the data to file from buffer
// // stores the voice buffer
// short[] shorts = new short[bytes.length/2];
// to turn bytes to shorts as either big endian or little
// endian.
// ByteBuffer.wrap(bytes).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().get(shorts);
// to turn shorts back to bytes.
byte[] bytes2 = new byte[buffer.length * 2];
ByteBuffer.wrap(bytes2).order(ByteOrder.LITTLE_ENDIAN)
.asShortBuffer().put(buffer);
os.write(bytes2);
// ServerInteractor.SendAudio(buffer);
} catch (IOException e) {
e.printStackTrace();
}
}
}
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
private void WriteWaveFileHeader(FileOutputStream out, long totalAudioLen,
long totalDataLen, long longSampleRate, int channels, long byteRate)
throws IOException {
System.out.println("---9---");
byte[] header = new byte[4088];
header[0] = 'R'; // RIFF/WAVE header
header[1] = 'I';
header[2] = 'F';
header[3] = 'F';
header[4] = (byte) (totalDataLen & 0xff);
header[5] = (byte) ((totalDataLen >> 8) & 0xff);
header[6] = (byte) ((totalDataLen >> 16) & 0xff);
header[7] = (byte) ((totalDataLen >> 24) & 0xff);
header[8] = 'W';
header[9] = 'A';
header[10] = 'V';
header[11] = 'E';
header[12] = 'f'; // 'fmt ' chunk
header[13] = 'm';
header[14] = 't';
header[15] = ' ';
header[16] = 16; // 4 bytes: size of 'fmt ' chunk
header[17] = 0;
header[18] = 0;
header[19] = 0;
header[20] = 1; // format = 1
header[21] = 0;
header[22] = (byte) RECORDER_CHANNELS_INT;
header[23] = 0;
header[24] = (byte) (longSampleRate & 0xff);
header[25] = (byte) ((longSampleRate >> 8) & 0xff);
header[26] = (byte) ((longSampleRate >> 16) & 0xff);
header[27] = (byte) ((longSampleRate >> 24) & 0xff);
header[28] = (byte) (byteRate & 0xff);
header[29] = (byte) ((byteRate >> 8) & 0xff);
header[30] = (byte) ((byteRate >> 16) & 0xff);
header[31] = (byte) ((byteRate >> 24) & 0xff);
header[32] = (byte) (RECORDER_CHANNELS_INT * RECORDER_BPP / 8); // block align
header[33] = 0;
header[34] = RECORDER_BPP; // bits per sample
header[35] = 0;
header[36] = 'd';
header[37] = 'a';
header[38] = 't';
header[39] = 'a';
header[40] = (byte) (totalAudioLen & 0xff);
header[41] = (byte) ((totalAudioLen >> 8) & 0xff);
header[42] = (byte) ((totalAudioLen >> 16) & 0xff);
header[43] = (byte) ((totalAudioLen >> 24) & 0xff);
out.write(header, 0, 4088);
}
}
Solution 3
int channels = 1 instead of int channels = 2 for CHANNELS = AudioFormat.CHANNEL_IN_MONO!
Author by
Rahul Baradia
Working as a Android developer.. For more informations, You can contact me on LinkedIn. Personal profile link: Rahul Baradia (http://rahulbaradia.com).
Updated on June 07, 2022Comments
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Rahul Baradia almost 2 years
I am trying to record a audio & stores into a sdcard as well as send to server. When I am trying to play recorded voice its playing,but not as I have recorded. If I record voice for 10mins it ll play for 4min i.e someone has pressed fast forward button with some noisy sound. I am not getting where I am going wrong. Can anybody say me how to solve this problem (should play how much i have recorded i.e 10min recorded then should play only 10mins).
Here is the code.. sorry for posting bulk code..
public class Audio_Call extends Activity { private static final int RECORDER_BPP = 16; private static final String AUDIO_RECORDER_FILE_EXT_WAV = "AudioRecorder.wav"; private static final String AUDIO_RECORDER_FOLDER = "AudioRecorder"; private static final String AUDIO_RECORDER_TEMP_FILE = "record_temp.raw"; private static final int RECORDER_SAMPLERATE = 8000; private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO; private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT; private AudioRecord recorder = null; // private int bufferSize = 200000; private int bufferSize = 0; short[] buffer; private Thread recordingThread = null; private boolean isRecording = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.audio_call); setButtonHandlers(); enableButtons(false); bufferSize = AudioRecord.getMinBufferSize(RECORDER_SAMPLERATE, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING); } private void setButtonHandlers() { ((Button) findViewById(R.id.btnStart)).setOnClickListener(btnClick); ((Button) findViewById(R.id.btnStop)).setOnClickListener(btnClick); } private void enableButton(int id, boolean isEnable) { ((Button) findViewById(id)).setEnabled(isEnable); } private void enableButtons(boolean isRecording) { enableButton(R.id.btnStart, !isRecording); enableButton(R.id.btnStop, isRecording); } // stores the file into the SDCARD private String getFilename() { System.out.println("---3---"); String filepath = Environment.getExternalStorageDirectory().getPath(); File file = new File(filepath, AUDIO_RECORDER_FOLDER); if (!file.exists()) { file.mkdirs(); } return (file.getAbsolutePath() + "/" + AUDIO_RECORDER_FILE_EXT_WAV); } // stores the file into the SDCARD private String getTempFilename() { // Creates the temp file to store buffer System.out.println("---4-1--"); String filepath = Environment.getExternalStorageDirectory().getPath(); System.out.println("---4-2--"); File file = new File(filepath, AUDIO_RECORDER_FOLDER); System.out.println("---4-3--"); if (!file.exists()) { file.mkdirs(); } File tempFile = new File(filepath, AUDIO_RECORDER_TEMP_FILE); System.out.println("---4-4--"); if (tempFile.exists()) tempFile.delete(); System.out.println("---4-5--"); return (file.getAbsolutePath() + "/" + AUDIO_RECORDER_TEMP_FILE); } private void startRecording() { int buffercount = 4088 / bufferSize; if (buffercount < 1) buffercount = 1; recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, RECORDER_SAMPLERATE, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING, bufferSize * buffercount); buffer = new short[4088]; recorder.startRecording(); isRecording = true; recordingThread = new Thread(new Runnable() { @Override public void run() { writeAudioDataToFile(); } }, "AudioRecorder Thread"); recordingThread.start(); } private void writeAudioDataToFile() { // Write the output audio in byte byte data[] = new byte[bufferSize]; String filename = getTempFilename(); // FileOutputStream os = null; // try { // os = new FileOutputStream(filename); // } catch (FileNotFoundException e) { e.printStackTrace(); } int read = 0; // if (null != os) { while (isRecording) { // gets the voice output from microphone to byte format recorder.read(buffer, 0, buffer.length); // read = recorder.read(data, 0, 6144); if (AudioRecord.ERROR_INVALID_OPERATION != read) { try { // // writes the data to file from buffer // // stores the voice buffer // short[] shorts = new short[bytes.length/2]; // to turn bytes to shorts as either big endian or little // endian. // ByteBuffer.wrap(bytes).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().get(shorts); // to turn shorts back to bytes. byte[] bytes2 = new byte[buffer.length * 2]; ByteBuffer.wrap(bytes2).order(ByteOrder.LITTLE_ENDIAN) .asShortBuffer().put(buffer); os.write(bytes2); SendAudio(buffer); } catch (IOException e) { e.printStackTrace(); } } } try { os.close(); } catch (IOException e) { e.printStackTrace(); } } // } private void stopRecording() { // stops the recording activity if (null != recorder) { isRecording = false; recorder.stop(); recorder.release(); recorder = null; recordingThread = null; } // copy the recorded file to original copy & delete the recorded copy copyWaveFile(getTempFilename(), getFilename()); deleteTempFile(); } private void deleteTempFile() { File file = new File(getTempFilename()); file.delete(); } private void copyWaveFile(String inFilename, String outFilename) { System.out.println("---8---"); FileInputStream in = null; FileOutputStream out = null; long totalAudioLen = 0; long totalDataLen = totalAudioLen + 36; long longSampleRate = RECORDER_SAMPLERATE; int channels = 2; long byteRate = RECORDER_BPP * RECORDER_SAMPLERATE * channels / 8; byte[] data = new byte[bufferSize]; try { in = new FileInputStream(inFilename); out = new FileOutputStream(outFilename); totalAudioLen = in.getChannel().size(); totalDataLen = totalAudioLen + 36; AppLog.logString("File size: " + totalDataLen); WriteWaveFileHeader(out, totalAudioLen, totalDataLen, longSampleRate, channels, byteRate); byte[] bytes2 = new byte[buffer.length * 2]; ByteBuffer.wrap(bytes2).order(ByteOrder.LITTLE_ENDIAN) .asShortBuffer().put(buffer); while (in.read(bytes2) != -1) { out.write(bytes2); } in.close(); out.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } private void WriteWaveFileHeader(FileOutputStream out, long totalAudioLen, long totalDataLen, long longSampleRate, int channels, long byteRate) throws IOException { System.out.println("---9---"); byte[] header = new byte[4088]; header[0] = 'R'; // RIFF/WAVE header header[1] = 'I'; header[2] = 'F'; header[3] = 'F'; header[4] = (byte) (totalDataLen & 0xff); header[5] = (byte) ((totalDataLen >> 8) & 0xff); header[6] = (byte) ((totalDataLen >> 16) & 0xff); header[7] = (byte) ((totalDataLen >> 24) & 0xff); header[8] = 'W'; header[9] = 'A'; header[10] = 'V'; header[11] = 'E'; header[12] = 'f'; // 'fmt ' chunk header[13] = 'm'; header[14] = 't'; header[15] = ' '; header[16] = 16; // 4 bytes: size of 'fmt ' chunk header[17] = 0; header[18] = 0; header[19] = 0; header[20] = 1; // format = 1 header[21] = 0; header[22] = (byte) channels; header[23] = 0; header[24] = (byte) (longSampleRate & 0xff); header[25] = (byte) ((longSampleRate >> 8) & 0xff); header[26] = (byte) ((longSampleRate >> 16) & 0xff); header[27] = (byte) ((longSampleRate >> 24) & 0xff); header[28] = (byte) (byteRate & 0xff); header[29] = (byte) ((byteRate >> 8) & 0xff); header[30] = (byte) ((byteRate >> 16) & 0xff); header[31] = (byte) ((byteRate >> 24) & 0xff); header[32] = (byte) (2 * 16 / 8); // block align header[33] = 0; header[34] = RECORDER_BPP; // bits per sample header[35] = 0; header[36] = 'd'; header[37] = 'a'; header[38] = 't'; header[39] = 'a'; header[40] = (byte) (totalAudioLen & 0xff); header[41] = (byte) ((totalAudioLen >> 8) & 0xff); header[42] = (byte) ((totalAudioLen >> 16) & 0xff); header[43] = (byte) ((totalAudioLen >> 24) & 0xff); out.write(header, 0, 4088); } private View.OnClickListener btnClick = new View.OnClickListener() { @Override public void onClick(View v) { switch (v.getId()) { case R.id.btnStart: { AppLog.logString("Start Recording"); enableButtons(true); startRecording(); break; } case R.id.btnStop: { AppLog.logString("Stop Recording"); enableButtons(false); stopRecording(); break; } } } }; public void SendAudio(final short data[]) { Thread thrd = new Thread(new Runnable() { String LOG_TAG = null; long SAMPLE_INTERVAL = 10; @Override public void run() { Log.e(LOG_TAG, "start send thread, thread id: "); long file_size = 0; int bytes_read = 0; int bytes_count = 0; // byte[] buf = new byte[bufferSize]; // buf = data; try { // byte [] b = "192.168.1.40".getBytes(); byte[] b = new byte[] { (byte) 192, (byte) 168, (byte) 1, (byte) 39 }; InetAddress addr = InetAddress.getLocalHost(); InetAddress addr1 = InetAddress.getByAddress(b); HttpClient httpclient = new DefaultHttpClient(); ServerUrl url = new ServerUrl(); String url_page = ServerUrl.url_audio; // String value = new String(buf); // System.out.println("mmdata--------- " + value); HttpPost httppost = new HttpPost(url_page); // Unix time stamp long unixTime = System.currentTimeMillis() / 1000L; String timestamp = String.valueOf(unixTime); // Json Format JSONObject holder = new JSONObject(); JSONArray jArray = new JSONArray(); try { holder.put("UserId", "1"); holder.put("Timestamp", timestamp); // holder.put("length", value.length()); for (int i = 0; i < buffer.length; i++) { jArray.put(i, buffer[i]); } holder.put("MMData", jArray); System.out.println("ARRAYYYY" + jArray); } catch (JSONException e1) { e1.printStackTrace(); } try { List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>( 2); nameValuePairs.add(new BasicNameValuePair("MMData", jArray.toString())); httppost.setEntity(new UrlEncodedFormEntity( nameValuePairs)); StringEntity se = new StringEntity(jArray.toString()); se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE, "application/json")); httppost.setEntity(se); HttpResponse response = httpclient.execute(httppost); } catch (ClientProtocolException e) { System.out.println("-------13"); e.printStackTrace(); } catch (IOException e) { System.out.println("-------14"); e.printStackTrace(); } catch (Exception e) { System.out.println("-------15"); System.out.println("Exception"); e.printStackTrace(); } bytes_count += bytes_read; Log.d(LOG_TAG, "bytes_count : " + bytes_count); Thread.sleep(SAMPLE_INTERVAL, 0); } catch (InterruptedException ie) { Log.e(LOG_TAG, "InterruptedException"); } catch (UnknownHostException uhe) { Log.e(LOG_TAG, "UnknownHostException"); } catch (IOException ie) { Log.e(LOG_TAG, "IOException"); } } // end run }); thrd.start(); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { finish(); } return super.onKeyDown(keyCode, event); } }help will be appreciated.. I have done search on this,but dint get proper solutions.. I am trying all other possibilities but not succeeded.
Many Thanks
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Michael almost 12 yearsCould you show how you call WriteWaveFileHeader? I.e. what are the values of the arguments you're passing to it? -
Rahul Baradia almost 12 years@Michael I have updated the code..
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Michael almost 12 yearsIs the resulting file the size you expect it to be? If you open the raw data in an audio editor (like Audacity) you should be able to find out what the samplerate / #channels really is by trying different import settings until you get it to play correctly.
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Rahul Baradia almost 12 years@Michael .. ya resulting size should be aorund 4k.. ok i ll try n let u knw
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Rahul Baradia almost 12 yearsI got where I was going wrong.. I was using wrong channel number.. and in header i was using 4088 size.. which is wrong I should use 44 size.. thanks guys..
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Vipul J over 11 years@TechEnd : I am trying above code, it is working fine on stereo channel but recording is distorted in mono channel. I tried changing channel also (1 for mono), but its not working. Can you tell me where am I wrong. -
Rahul Baradia over 11 yearscheck on real device.. coz on emulator we cant judge it. emulator supports only sample rate-8000 ,channel- mono or stereo, encoding-16 or 8 bit.
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Vipul J over 11 years@TechEnd : I am checking on real device only, its not working. Kindly help.
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Rahul Baradia over 11 yearshave u tried changing sampling rates n channels keeping encoding 16bit.. for example sample rate -44100 n channel- stereo or mon
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Rahul Baradia over 11 yearsworking fine without using wav header. recording audio file in pcm format & playing.