Oh, wouldn't that be bliss @cranky_granny.
My CD is a subliminal one titled 'Sleep Peacefully'.
Hubby puts his head on the pillow and then there is the sound of snoring. When he gets up for a toilet break he disturbs me, then he goes straight back to sleep - and I am awake for ages, often hours.
As I wear hearing aids during the day the CD needs to be louder - so he hears it through my earbuds. 😏