no sound on tv from macbook

I connected my Macbook (from 2009) to the TV. I can see the picture, but cannot get the sound from the macbook on the TV?

I have a connector in the headset port and a white & red plug in the TV. I cannot seem to figure out how to get the sound?

I have looked at the sound settings, but cannot select TV for instance for the sound output? I have an LG 32LH3300 TV.

I looked at the settings for the TV and there I can also not find any suitable option to get the sound.

I hope someone is able to help me.

Thanks!