windows phone 7 Recording Issue - windows-phone-7

Question

I will working on the Recording functionality in my windows phone 7 app.
I implemented the Recording functionality through this reference link.
It completely works fine at there and in my case also.
Actually the scenario is, In my application i created first page that will works as the recording screen as same as above referred link.
and when we stop the recording i redirected to the second page and saved that recording in Isolated storage and at the second page i bound the recorded sounds. At here i played the recorded sounds at it works fine.
Now, when i m again go to the recording screen(first page) and starts another recording. it will some times records fine and some times it will skip the some sounds during recording as like beep sounds and it will looks like a extra noise in recording and not getting properly recording sounds.
My Code is like,
public partial class NikhilRecord : PhoneApplicationPage
{
//XNA Objects for Record And Playback
Microphone mphone;
//Used for Storing captured buffers
List<byte[]> memobuffercollection = new List<byte[]>();
//Used for displaying stored memos
ObservableCollection<MemoInfo> memofiles = new ObservableCollection<MemoInfo>();
SpaceTime spaceTime = new SpaceTime();
public NikhilRecord()
{
InitializeComponent();
//Create new Microphone and set event handler.
mphone = Microphone.Default;
mphone.BufferReady += OnMicrophoneBufferReady;
String FileName = PhoneApplicationService.Current.State["MySelectedSong"].ToString();
using (IsolatedStorageFile IsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
try
{
using (IsolatedStorageFileStream fileStream = IsolatedStorage.OpenFile(FileName, FileMode.Open, FileAccess.Read))
{
MyMedia.SetSource(fileStream);
MyMedia.CurrentStateChanged += new RoutedEventHandler(mediaPlayer_CurrentStateChanged);
fileStream.Close();
fileStream.Dispose();
//Start Recording
OnRecordButtonClick();
}
}
catch (Exception exc)
{
MessageBox.Show(exc.Message);
}
}
void UpdateRecording(bool isRecording)
{
if (!isRecording)
{
using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
{
spaceTime.Space = storage.AvailableFreeSpace;
}
}
else
{
spaceTime.Space = memobuffercollection.Count * mphone.GetSampleSizeInBytes(mphone.BufferDuration);
}
spaceTime.Time = mphone.GetSampleDuration((int)Math.Min(spaceTime.Space, Int32.MaxValue));
}
void OnMicrophoneBufferReady(object sender, EventArgs e)
{
// Get buffer from microphone and add to collection
byte[] buffer = new byte[mphone.GetSampleSizeInBytes(mphone.BufferDuration)];
int bytesreturned = mphone.GetData(buffer);
memobuffercollection.Add(buffer);
UpdateRecording(true);
// To be Continue...
if (spaceTime.Time > TimeSpan.FromMinutes(10))
{
StopRecording();
UpdateRecording(false);
}
}
void OnRecordButtonClick()
{
if (mphone.State == MicrophoneState.Stopped)
{
// Clear the collection for storing the buffers
memobuffercollection.Clear();
// Start Recording
mphone.Start();
MyMedia.Play();
}
else
{
MyMedia.Stop();
//mphone.Stop();
PopUpGrid.Visibility = Visibility.Visible;
RecordGrid.Opacity = 0.5;
RecordGrid.IsHitTestVisible = false;
}
bool isRecording = mphone.State == MicrophoneState.Started;
UpdateRecording(isRecording);
}
void StopRecording()
{
// Get the last partial buffer
int sampleSize = mphone.GetSampleSizeInBytes(mphone.BufferDuration);
byte[] extraBuffer = new byte[sampleSize];
int extraBytes = mphone.GetData(extraBuffer);
// Stop Recording
mphone.Stop();
//Stop the Song
MyMedia.Stop();
// Create MemoInfo object and add at top of collection
int totalSize = memobuffercollection.Count * sampleSize + extraBytes;
TimeSpan duration = mphone.GetSampleDuration(totalSize);
MemoInfo memoInfo = new MemoInfo(DateTime.UtcNow, totalSize, duration);
memofiles.Insert(0, memoInfo);
// Save Data in IsolatedStorage
using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
{
string[] alldirectories = storage.GetDirectoryNames("NikDirectory");
if (alldirectories.Count() == 0)
storage.CreateDirectory("NikDirectory");
try
{
using (IsolatedStorageFileStream stream = storage.CreateFile("NikDirectory\\" + memoInfo.FileName))
{
// Write buffers from collection
foreach (byte[] buffer in memobuffercollection)
stream.Write(buffer, 0, buffer.Length);
// Write partial buffer
stream.Write(extraBuffer, 0, extraBytes);
stream.Close();
stream.Dispose();
}
Uri url = new Uri("/Gallery.xaml", UriKind.Relative);
NavigationService.Navigate(url);
memobuffercollection.Clear();
}
catch (Exception ees)
{
MessageBox.Show(ees.Message);
Uri url = new Uri("/Karaoke.xaml", UriKind.Relative);
NavigationService.Navigate(url);
}
}
bool isRecording = mphone.State == MicrophoneState.Started;
UpdateRecording(isRecording);
}
}
So, please help me out the problem. I heard at somewhere that you have to dispose all the objects of the microphone when you redirect to another screen. is it true ? or anything else.
Please help me.
Looking Forward.

Answer 1

Instead of using a collection, you should use following way to read your recorded bytes.
This should be done into the BufferReady event of your microphone object.
byte[] audioBuffer = new byte[microphone.GetSampleSizeInBytes(microphone.BufferDuration)];
microphone.GetData(audioBuffer);
RecordingStream.Write(audioBuffer, 0, audioBuffer.Length);
RecordingStream is a MemoryStream , should be declared globally.
I am not sure about this but as I have used it and it works completely fine in each case.
Try this.