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You need a variable to save whether the audio has been played before. Add an action to the audio
On: Done playing
Action: Modify variable
Target: Use the New variable… dialog to create a variable, initial value = 0
Type: Set equal to
Uncheck “Auto start” (if you’ve used it) and play the audio with an action on page level. Add a Condition to the action:
Only if “your_variable” “equal to” “0”.
A way to synch the display of the textfields would be to use events with the audio. Click “Synch events” in the audios properties and “Set event timings” to open the audio editor and add events.
You’ll need more actions on page level to show all textfields If “your_variable” equal to “1” to show the textfields when the audio is not playing.