FMOD.Sound.setMode C# (CSharp) Method

        public RESULT setMode                 (MODE mode)
        {
            return FMOD_Sound_SetMode(rawPtr, mode);
        }
        public RESULT getMode                 (out MODE mode)

    // Use this for initialization
    void Start () {
        lowLevelSystem = RuntimeManager.LowlevelSystem;
        channel = new FMOD.Channel();
        lowLevelSystem.getMasterChannelGroup(out channelGroup);

        soundInfo = new FMOD.CREATESOUNDEXINFO();
        soundInfo.cbsize = Marshal.SizeOf(soundInfo);
        soundInfo.decodebuffersize = (uint)sampleRate / 10;
        soundInfo.length = (uint)(sampleRate * numberOfChannels * sizeof(short));
        soundInfo.numchannels = numberOfChannels;
        soundInfo.defaultfrequency = sampleRate;
        soundInfo.format = FMOD.SOUND_FORMAT.PCM16;

        soundInfo.pcmreadcallback = PCMReadCallback;
        soundInfo.pcmsetposcallback = PCMSetPositionCallback;

        lowLevelSystem.setStreamBufferSize(65536, FMOD.TIMEUNIT.RAWBYTES);
        lowLevelSystem.createStream("SoundGeneratorStream", FMOD.MODE.OPENUSER, ref soundInfo, out generatedSound);

        generatedSound.setMode(FMOD.MODE.OPENUSER | FMOD.MODE._3D | FMOD.MODE._3D_LINEARSQUAREROLLOFF);

        lowLevelSystem.playSound(generatedSound, channelGroup, true, out channel);
        channel.setLoopCount(-1);
        channel.setMode(FMOD.MODE.LOOP_NORMAL);
        channel.setPosition(0, FMOD.TIMEUNIT.MS);
        channel.set3DMinMaxDistance(minDistance, maxDistance);
        Update();
        channel.setPaused(false);
    }