LTX 2.3 - prompting for no sound

How can you get LTX2.3 to not produce sound? I have tried things like 'no sound' 'no music' 'no audio' 'silent' etc. in my prompts, but it still makes sounds. If anything in the prompt could remotely be misunderstood as dialogue, it tries to have a character speak, otherwise it's just generic music. I just want the videos for now and to only get audio if I ask for it.