Song Information Retrieval

Question

I am trying to retrieve details from an .mp3 file in C# for an audio player.

Code snip:

[DllImport("winmm.dll")]

private static extern long mciSendString(string strCommand, StringBuilder strReturn, int iReturnLength, IntPtr hwndCallback);

public static void Close()
{
    _command = "close MediaFile";
    mciSendString(_command, null, 0, IntPtr.Zero);
    isOpen = false;
}

public static void Open(string sFileName)
{
    _command = "open \"" + sFileName + "\" type mpegvideo alias MediaFile";
    mciSendString(_command, null, 0, IntPtr.Zero);
    isOpen = true;
}

public static void Play(bool loop)
{
    if (isOpen)
    {
        _command = "play MediaFile";
        if (loop)
            _command += " REPEAT";
        mciSendString(_command, null, 0, IntPtr.Zero);
    }
}

My questions are:

• How would I set the volume of the song?
• How would I get the bit rate/sample rate of the song?

I would prefer using MCI or NAudio since I am aware of their reliability.

Answer 1

To set volume:

string command = "setaudio MediaFile volume to " + volume.ToString();
error = mciSendString(Pcommand, null, 0, IntPtr.Zero);

where volume is an int between 0 and 1000

There is a whole list of mci command strings on in the multimedia reference on msdn at:
set command

There is also a good example project on CodeProject that does most of the tings you are trying to do at: Simple MCI Player

HTH

Paul