How to remove the forced “SOUND_SAMPLE” in Audio → Play action (Construct 2 )?

Hi everyone,

I have another issue in Construct 2.

When I add the Audio → Play action, it always forces the “SOUND_SAMPLE” file in the Audio file field.

I cannot delete it, remove it, or clear the field. It automatically comes back every time.

I want to play an external audio file (URL from FileChooser), but the Play action does not let me remove the internal sound. Even if I try to type an expression, it turns red.

My question:

How can I completely remove or clear the internal SOUND_SAMPLE from the Play action so I can use my own expression (AJAX.LastData) instead?

( Construct 2)

Thanks!