Loom not picking up spoken text from Word read aloud


I am trying to create a presentation showing some of the accessibility functions in Offc365 such as word aloud reading. Loom picks up my voice but doesn't pick up the machine reading aloud. I have tried the 2 microphone options in Loom but it won't work.

Anyone any advice on this or an alternative software (preferably free) that will do this for me.



Update : Problem solved. Plugged in an external speaker and it picked it up then? Don't know why. Would be interested in an explanation.
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