Subliminal audio

Hi there,
I would like to create subliminal audio with background music and positive affirmations.
Can someone help me?
Thanks in advance

We have a section of postings on that.

https://forum.audacityteam.org/t/recording-question-please-help/270/1

Just so you know, not everyone is on board with Silent Subliminals.

it is my opinion that “Silent Subliminals” are pseudo-science nonsense.

Koz