I read an article about audio subliminals in the early 1990s. The study could find no messages on the tapes and no results from the subliminals. Richard Bandler used a subliminal recording machine to make "relaxation" tapes with suggestions like "everything will freak you out" and told people the tapes would help them relax. Those who listened to the tapes told him how relaxing they were, showing that it was his suggestion and their expectations and not the subliminal messages that had the effect.
Embedded commands work differently. You use them in a command tonality but embed them in a sentence so the conscious mind does not recognize it. It is best to use them in groups so the unconscious will see a pattern. People will not follow commands that violate their values. For example, if you say, "I have a friend named ROB who works at A BANK." The listener will hear the command "ROB A BANK" unconsciously but it is very unlikely they will even consider doing it.
