Google says:
https://www.google.de/#q=detect+audio+device+c%23[
^]
Try
one of the first hits:
public class Win32 {
[DllImport("winmm.dll", SetLastError=true)]
static extern uint waveOutGetNumDevs();
[DllImport("winmm.dll", SetLastError = true, CharSet = CharSet.Auto)]
public static extern uint waveOutGetDevCaps(uint hwo,ref WAVEOUTCAPS pwoc,uint cbwoc);
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct WAVEOUTCAPS {
public ushort wMid;
public ushort wPid;
public uint vDriverVersion;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
public string szPname;
public uint dwFormats;
public ushort wChannels;
public ushort wReserved1;
public uint dwSupport;
}
public static string [] GetSoundDevices() {
uint devices = waveOutGetNumDevs();
string [] result = new string[devices];
WAVEOUTCAPS caps = new WAVEOUTCAPS();
for(uint i = 0; i < devices; i++) {
waveOutGetDevCaps(i, ref caps, (uint)Marshal.SizeOf(caps));
result[i] = caps.szPname;
}
return result;
}
}