returns a list of available devices if (on windows vista and 7) the ALC_ENUMERATE_ALL_EXT is present. If only ALC_ENUMERATION_EXT is present it returns (on windows vista and 7) the default device. It may returns all the devices on a unix. If no extension is present it returns the default device. We might change it so it returns null instead.

gistfile1.cs

public static readonly string [] OpenAlGetDeviceList
{
  get
	{
		string[] DeviceList;
		if (Alc.alcIsExtensionPresent(IntPtr.Zero, "ALC_ENUMERATE_ALL_EXT") == Alc.ALC_TRUE)
		{
			DeviceList = Alc.alcGetStringv(IntPtr.Zero, Alc.ALC_ALL_DEVICES_SPECIFIER);
			if (Al.alGetError() != Al.AL_NO_ERROR)
				throw new InvalidOperationException("Can't get OpenAL device list.");
				// maybe just return null and log the error
			return DeviceList;
		}
		else if (Alc.alcIsExtensionPresent(IntPtr.Zero, "ALC_ENUMERATION_EXT") == Alc.ALC_TRUE)
		{
			DeviceList = Alc.alcGetStringv(IntPtr.Zero, Alc.ALC_DEVICE_SPECIFIER);
			if (Al.alGetError() != Al.AL_NO_ERROR)
				throw new InvalidOperationException("Can't get OpenAL device list.");
			return DeviceList;
		}
		else
		{
			DeviceList = Alc.alcGetStringv(IntPtr.Zero, Alc.ALC_DEFAULT_DEVICE_SPECIFIER);
			if (Al.alGetError() != Al.AL_NO_ERROR)
				throw new InvalidOperationException("Can't get OpenAL default device name.");
			return DeviceList;
			// or simply return null;
		}
	}
}