Please help in taking input from mic and output to speakers

wajeeha javed

The code does not work i am trying to record voice from mic when start button press and output to the spaeaker when user press play button and stop play or record . Implemented in visual studio 2008 using c#
Its not working properly

2 Replies

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Lalit M16y ago

Step by step guide

1. Open C#.net web applications. And added the blow namespace.

using Microsoft.VisualBasic.Devices;
using Microsoft.VisualBasic;
using System.Runtime.InteropServices;

2. Add the below API.
[DllImport("winmm.dll", EntryPoint = "mciSendStringA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int mciSendString(string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);

3. Create three Buttons and given the below name and text for the buttons.

1. Record 
2. SaveStop
3. Read

1. Under Record Button Click paste the below Code:

// record from microphone
mciSendString("open new Type waveaudio Alias recsound", "", 0, 0);
mciSendString("record recsound", "", 0, 0);

2. Under Save / Stop button Click, 


// stop and save
mciSendString("save recsound c:\\record.wav", "", 0, 0);
mciSendString("close recsound ", "", 0, 0);
Computer c = new Computer();
c.Audio.Stop();

3. Under Read Button Click

Computer computer = new Computer();
computer.Audio.Play("c:\\record.wav", AudioPlayMode.Background);

Raaj Kumar16y ago
Hi Javed,
Below is the code for what you were looking for. Make sure that you are adding reference to Microsoft.VisualBasic from Add reference window.

using System.Runtime.InteropServices;
using Microsoft.VisualBasic;
using Microsoft.VisualBasic.Devices;
[DllImport("winmm.dll", EntryPoint = "mciSendStringA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int mciSendString(string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);
private void Record()
{
mciSendString("open new Type waveaudio Alias recsound", "", 0, 0);
mciSendString("record recsound", "", 0, 0);
}
private void SaveRecordedSound()
{
mciSendString("save recsound c:\\record.wav", "", 0, 0);
mciSendString("close recsound ", "", 0, 0);
Computer computer = new Computer();
computer.Audio.Stop();
}
private void Play()
{
Computer computer = new Computer();
computer.Audio.Play("c:\\record.wav", AudioPlayMode.Background);
}

Regards,
Raaj