Locked screen advancement

My client wants to prohibit the learner from advancing to the next screen until:

• screen audio completes AND
• all screen interactions are complete.

I have the Next button's initial state as disabled. 

I would like to have the Next button's state change to Normal when all the screen elements/interactions are complete, but I can't figure out how to call the right combination of triggers. 

I've attached a sample of one of the screen interaction types. A learner would advance when:

• audio is complete AND
• one of the six buttons are selected AND
• text is entered into the data field.

I could really use some advice. I've been trying different things to make it work and I'm stuck. 

Thanks!